diff --git a/VERSION b/VERSION
index 96506fd..e314328 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-v3.0.2
+v3.0.3
diff --git a/field.go b/field.go
index e0c2182..875fb4a 100644
--- a/field.go
+++ b/field.go
@@ -415,7 +415,8 @@ func (f *Field) setTerraformTypeOverride(c *FieldBuildContext) {
 
 		f.ElemType = f.Type
 		f.ElemValueType = f.ValueType
-		f.ValueCastFromType = f.ValueCastToType
+		f.GoType = f.ValueCastFromType
+		f.GoElemType = f.ValueCastFromType
 	}
 }
 
diff --git a/test/config.yaml b/test/config.yaml
index 7ed39a7..979bd42 100644
--- a/test/config.yaml
+++ b/test/config.yaml
@@ -51,3 +51,10 @@ validators:
 
 custom_types:
   "Test.StringOverride": StringCustom
+
+schema_types:
+  "Test.SchemaOverride":
+    type: "github.com/hashicorp/terraform-plugin-framework/types.StringType"
+    value_type: "github.com/hashicorp/terraform-plugin-framework/types.String"
+    cast_to_type: "string"
+    cast_from_type: "OverrideCastType"
diff --git a/test/custom_types.go b/test/custom_types.go
index 90d07ae..f76da22 100644
--- a/test/custom_types.go
+++ b/test/custom_types.go
@@ -143,3 +143,5 @@ func CopyToStringCustom(diags diag.Diagnostics, obj string, t attr.Type, v attr.
 
 	return value
 }
+
+type OverrideCastType string
diff --git a/test/fixtures.go b/test/fixtures.go
index 977f0c8..5069e86 100644
--- a/test/fixtures.go
+++ b/test/fixtures.go
@@ -99,6 +99,8 @@ func createTestObj() *Test {
 				EmbeddedNestedString: "embdtest2",
 			},
 		},
+
+		SchemaOverride: "hello",
 	}
 }
 
@@ -428,8 +430,9 @@ func copyFromTerraformObject(t *testing.T) types.Object {
 				types.String{Value: "b"},
 				types.String{Value: "c"},
 			}},
-			"foo": types.String{Null: true},
-			"bar": types.String{Value: "ham"},
+			"foo":             types.String{Null: true},
+			"bar":             types.String{Value: "ham"},
+			"schema_override": types.String{Value: "hello"},
 		},
 		AttrTypes: obj.AttrTypes,
 	}
diff --git a/test/test.pb.go b/test/test.pb.go
index fa7f1aa..2ea7a97 100644
--- a/test/test.pb.go
+++ b/test/test.pb.go
@@ -141,6 +141,7 @@ type Test struct {
 	//	*Test_Foo
 	//	*Test_Bar
 	LowerSnakeOneof      isTest_LowerSnakeOneof `protobuf_oneof:"lower_snake_oneof"`
+	SchemaOverride       OverrideCastType       `protobuf:"bytes,43,opt,name=SchemaOverride,proto3,casttype=OverrideCastType" json:"schema_override"`
 	XXX_NoUnkeyedLiteral struct{}               `json:"-"`
 	XXX_unrecognized     []byte                 `json:"-"`
 	XXX_sizecache        int32                  `json:"-"`
@@ -579,80 +580,83 @@ func init() {
 func init() { proto.RegisterFile("test.proto", fileDescriptor_c161fcfdc0c3ff1e) }
 
 var fileDescriptor_c161fcfdc0c3ff1e = []byte{
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+	0x8a, 0xd3, 0x59, 0xfc, 0x1a, 0x36, 0xd2, 0x58, 0xb0, 0x94, 0x4b, 0x31, 0xe1, 0x45, 0x24, 0xbc,
+	0x0b, 0xa5, 0x20, 0xf5, 0x60, 0xe4, 0xf9, 0x4e, 0x9f, 0x96, 0xa4, 0xac, 0xf8, 0x6e, 0xac, 0x17,
+	0x82, 0x0c, 0x4b, 0x71, 0xd0, 0x82, 0xb5, 0x24, 0x12, 0x7c, 0x73, 0x39, 0x43, 0x9c, 0x4d, 0xc5,
+	0x4d, 0x80, 0x03, 0xdf, 0xed, 0x0e, 0x3a, 0x3f, 0x74, 0x3d, 0x9f, 0x96, 0x0d, 0xcd, 0x5c, 0x60,
+	0x31, 0x04, 0x4d, 0x58, 0x8e, 0xa2, 0xdd, 0xfe, 0xd0, 0x3f, 0xa5, 0x2b, 0x92, 0x94, 0x86, 0xf1,
+	0x1e, 0x94, 0xc4, 0x49, 0x55, 0xf6, 0xd2, 0x0d, 0x0d, 0xcd, 0x2c, 0x58, 0xa5, 0x3f, 0xc7, 0x3a,
+	0x44, 0x19, 0x96, 0x62, 0xe1, 0xff, 0x60, 0xc1, 0x12, 0x87, 0x59, 0x4a, 0x56, 0x0d, 0xcd, 0x2c,
+	0xb2, 0x08, 0xc0, 0x3d, 0x58, 0x0a, 0x37, 0x4b, 0x32, 0x2a, 0x86, 0xf6, 0x2f, 0xfb, 0x9c, 0x97,
+	0x7b, 0x9c, 0x94, 0xe1, 0x97, 0x80, 0xc9, 0x05, 0x90, 0x66, 0x6b, 0x86, 0x36, 0xb5, 0x50, 0x19,
+	0x3c, 0xbc, 0x05, 0x73, 0x0d, 0xee, 0xf9, 0xbc, 0x4d, 0xd7, 0xe5, 0x31, 0x2b, 0x6e, 0xcb, 0x56,
+	0xa3, 0x30, 0x2b, 0x2f, 0xee, 0x02, 0x9b, 0x30, 0xf0, 0x3e, 0x94, 0xd4, 0x28, 0x3c, 0xfa, 0x1b,
+	0x17, 0x68, 0x08, 0x4b, 0x31, 0x91, 0x41, 0x35, 0x89, 0x24, 0x8e, 0x38, 0xbd, 0xd0, 0xe7, 0x3d,
+	0x2a, 0xac, 0x03, 0xa8, 0xac, 0xac, 0xf8, 0x92, 0x5c, 0xbe, 0xac, 0xf9, 0xc7, 0x58, 0x68, 0x01,
+	0x46, 0x51, 0x58, 0x47, 0xf5, 0x02, 0x2d, 0x61, 0x19, 0x6c, 0xbc, 0x0e, 0xda, 0xbe, 0x3d, 0xa4,
+	0x97, 0xa5, 0x68, 0x55, 0x89, 0x44, 0x53, 0xdd, 0xde, 0xb7, 0x87, 0xbb, 0x03, 0xdf, 0x3d, 0x65,
+	0x22, 0x8f, 0x5f, 0xc1, 0xc2, 0xbe, 0x3d, 0x6c, 0xb6, 0x5e, 0xf0, 0x23, 0x9f, 0x5e, 0x91, 0xe4,
+	0x4b, 0x49, 0xb2, 0xca, 0x49, 0xc9, 0x64, 0xaa, 0x91, 0x02, 0x9f, 0xc1, 0x4a, 0x18, 0x84, 0x13,
+	0xdd, 0x94, 0x36, 0x57, 0xb3, 0x6c, 0x02, 0x4e, 0x64, 0x47, 0xd8, 0xb4, 0x03, 0x6e, 0x42, 0x7e,
+	0xdf, 0x69, 0x73, 0xaa, 0x1b, 0xc4, 0x2c, 0xd5, 0x41, 0x39, 0x09, 0x84, 0x49, 0x1c, 0xab, 0x50,
+	0xd8, 0x7d, 0x7d, 0xd4, 0x1b, 0xb5, 0x79, 0x9b, 0x1a, 0xb2, 0x4d, 0x87, 0x31, 0xde, 0x84, 0x79,
+	0xcb, 0xb5, 0x07, 0x47, 0x27, 0x77, 0xe8, 0x55, 0xb9, 0x63, 0x4b, 0x4a, 0x3e, 0x01, 0x1f, 0xcd,
+	0xb0, 0x20, 0x1f, 0x51, 0xeb, 0xb4, 0x36, 0x4d, 0xad, 0x47, 0xd4, 0x3a, 0x56, 0x03, 0xea, 0x0e,
+	0xfd, 0xbf, 0xf8, 0x1d, 0x45, 0xb9, 0x1d, 0x7c, 0x0c, 0x28, 0xef, 0xe0, 0x3e, 0xf7, 0x3c, 0xbb,
+	0xc3, 0x15, 0x4c, 0xaf, 0x49, 0x47, 0xaa, 0x1c, 0xa7, 0xf3, 0x8f, 0x08, 0xcb, 0x50, 0xe1, 0x35,
+	0x28, 0xaa, 0x9b, 0x3d, 0x71, 0xb9, 0x2e, 0x3f, 0x46, 0x58, 0x02, 0xc5, 0xef, 0x60, 0x69, 0xb7,
+	0xdf, 0xe2, 0xed, 0x36, 0x6f, 0xef, 0x75, 0x79, 0xaf, 0x4d, 0x6f, 0xc8, 0x8f, 0xad, 0x06, 0x1f,
+	0x8b, 0xa5, 0xac, 0xa2, 0xd8, 0xb3, 0x37, 0x63, 0x9d, 0x9c, 0x8b, 0xbd, 0x4b, 0xea, 0xf0, 0xe1,
+	0xc4, 0x28, 0xdc, 0xbb, 0x2d, 0x69, 0x54, 0x99, 0xac, 0xb8, 0xfd, 0xfa, 0xdb, 0x0e, 0x0f, 0x2e,
+	0xa4, 0x55, 0x48, 0xb9, 0x84, 0xdb, 0x75, 0x03, 0x4a, 0x6a, 0x7a, 0xcd, 0x57, 0xdc, 0x75, 0xbb,
+	0x6d, 0x4e, 0x4d, 0x31, 0x6d, 0x96, 0x42, 0x11, 0x41, 0x3b, 0x76, 0x1c, 0x7a, 0x53, 0xd6, 0x94,
+	0x63, 0x22, 0x10, 0x58, 0xcb, 0x76, 0xe9, 0xad, 0x00, 0x6b, 0xd9, 0x2e, 0x36, 0xa1, 0x74, 0x70,
+	0x74, 0xc2, 0xfb, 0x76, 0xe8, 0xf7, 0x89, 0x7c, 0x02, 0x6c, 0x9d, 0x8f, 0xf5, 0x65, 0x4f, 0x66,
+	0x0e, 0x9d, 0x49, 0xea, 0xdd, 0x58, 0x2f, 0x07, 0xb4, 0x07, 0xb6, 0xe7, 0x3f, 0x3d, 0x1d, 0x72,
+	0x96, 0x92, 0x57, 0xef, 0x41, 0x21, 0x38, 0xf6, 0x58, 0x06, 0xed, 0x25, 0x3f, 0x55, 0x8f, 0x0a,
+	0x26, 0x86, 0xe2, 0xe7, 0xfe, 0x4a, 0xde, 0xf0, 0x9c, 0xc4, 0x54, 0x70, 0x3f, 0xf7, 0x39, 0xa9,
+	0x3e, 0x86, 0x52, 0xf2, 0x06, 0x64, 0xa8, 0x6b, 0x71, 0x75, 0xea, 0x7e, 0xc6, 0xbd, 0x18, 0xac,
+	0x67, 0x5f, 0x83, 0x8f, 0xf7, 0xb4, 0xe6, 0x61, 0xb6, 0x39, 0xe0, 0xcd, 0x63, 0x6b, 0x03, 0xd6,
+	0xe4, 0x40, 0xb4, 0x9e, 0xc4, 0xa9, 0x5a, 0x85, 0x95, 0x9e, 0xf3, 0x0b, 0x77, 0x0f, 0xbd, 0x81,
+	0xfd, 0x92, 0x1f, 0x3a, 0x03, 0xee, 0x1c, 0xd7, 0xbe, 0x11, 0x65, 0xc5, 0xb7, 0x16, 0x3f, 0x85,
+	0x59, 0xd5, 0xe4, 0x88, 0xfc, 0x77, 0x6d, 0x9c, 0x8f, 0xf5, 0xf9, 0xbe, 0xfd, 0xfa, 0xd0, 0xee,
+	0xf0, 0x44, 0x77, 0x56, 0xac, 0x5a, 0x25, 0xeb, 0xc4, 0xd7, 0xfe, 0xc8, 0x05, 0x7d, 0x5a, 0x94,
+	0x14, 0xbe, 0xdc, 0xd4, 0x7b, 0xed, 0x4e, 0xa2, 0x0f, 0xe6, 0x64, 0x8b, 0x58, 0x51, 0x75, 0x35,
+	0xfd, 0x13, 0xee, 0x4e, 0x8a, 0x8b, 0xb7, 0xc1, 0x2d, 0xd5, 0xc2, 0x34, 0xc9, 0x5d, 0x8b, 0xaf,
+	0x41, 0xaa, 0x89, 0xfd, 0x04, 0xcb, 0xd1, 0xd2, 0xaa, 0x1f, 0x45, 0x3e, 0xde, 0x83, 0x22, 0x51,
+	0x9c, 0x13, 0x6f, 0x69, 0x69, 0xfd, 0x47, 0x9f, 0x98, 0x67, 0x50, 0xc9, 0xfa, 0x4c, 0x86, 0xc7,
+	0x56, 0x72, 0x8f, 0x33, 0xd6, 0x22, 0xb2, 0xad, 0xe9, 0xb0, 0x18, 0xcb, 0x4c, 0x2f, 0x6f, 0xed,
+	0x72, 0xd8, 0xf5, 0x32, 0x92, 0x7a, 0xd8, 0xe7, 0xa2, 0x67, 0x33, 0x89, 0x3d, 0x9b, 0x6b, 0xbf,
+	0x93, 0x54, 0x43, 0xc1, 0x2f, 0xa0, 0x14, 0x00, 0xea, 0x12, 0x4f, 0x5e, 0xe1, 0xab, 0xe2, 0x0a,
+	0xf2, 0x49, 0xe6, 0xd0, 0x93, 0x29, 0x96, 0xa2, 0xe2, 0x13, 0x58, 0x0d, 0x10, 0x35, 0x61, 0xd5,
+	0xa4, 0x54, 0xa1, 0x97, 0x92, 0x4d, 0x2a, 0x46, 0x60, 0x59, 0xaa, 0x1a, 0xcf, 0x34, 0xc3, 0x06,
+	0x54, 0x92, 0x70, 0x62, 0x9a, 0xd5, 0xf3, 0xb1, 0xbe, 0x1e, 0x4e, 0x73, 0x20, 0x09, 0xc1, 0x6c,
+	0x33, 0x75, 0xb7, 0xae, 0xa9, 0x5f, 0x0e, 0x2e, 0xc2, 0xfc, 0xb3, 0xc6, 0x93, 0x46, 0xf3, 0x79,
+	0xa3, 0x3c, 0x83, 0x73, 0x90, 0x6b, 0x36, 0xca, 0x04, 0xe7, 0x41, 0x6b, 0xee, 0xed, 0x95, 0x73,
+	0x56, 0xf1, 0xec, 0xef, 0xcd, 0x99, 0xb3, 0xb7, 0x9b, 0x33, 0x6f, 0xde, 0x6e, 0xce, 0xb4, 0xe6,
+	0xe4, 0xf3, 0x67, 0xe7, 0x9f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x14, 0x22, 0x91, 0xb8, 0xfa, 0x0c,
+	0x00, 0x00,
 }
diff --git a/test/test.proto b/test/test.proto
index 09202ab..6ea9b2a 100644
--- a/test/test.proto
+++ b/test/test.proto
@@ -178,6 +178,11 @@ message Test {
         string foo = 41;
         string bar = 42;
     }
+
+  string SchemaOverride = 43 [
+    (gogoproto.jsontag) = "schema_override",
+    (gogoproto.casttype) = "OverrideCastType"
+  ];
 }
 
 message MaxAgeDuration {
@@ -234,4 +239,4 @@ message EmbeddedField {
 message EmbeddedNestedField {
      // EmbeddedNestedString string field
     string EmbeddedNestedString = 1 [(gogoproto.jsontag) = "embedded_nested_string"];
-  }
+}
diff --git a/test/test_terraform.go b/test/test_terraform.go
index b5f04e2..b0ca08f 100644
--- a/test/test_terraform.go
+++ b/test/test_terraform.go
@@ -423,6 +423,11 @@ func GenSchemaTest(ctx context.Context) (github_com_hashicorp_terraform_plugin_f
 			Description: "NestedNullableWithNilValue nested message field, with no value set",
 			Optional:    true,
 		},
+		"schema_override": {
+			Description: "",
+			Optional:    true,
+			Type:        github_com_hashicorp_terraform_plugin_framework_types.StringType,
+		},
 		"str": {
 			Computed:      true,
 			Description:   "Str string field",
@@ -2067,6 +2072,23 @@ func CopyTestFromTerraform(_ context.Context, tf github_com_hashicorp_terraform_
 			}
 		}
 	}
+	{
+		a, ok := tf.Attrs["schema_override"]
+		if !ok {
+			diags.Append(attrReadMissingDiag{"Test.SchemaOverride"})
+		} else {
+			v, ok := a.(github_com_hashicorp_terraform_plugin_framework_types.String)
+			if !ok {
+				diags.Append(attrReadConversionFailureDiag{"Test.SchemaOverride", "github.com/hashicorp/terraform-plugin-framework/types.String"})
+			} else {
+				var t OverrideCastType
+				if !v.Null && !v.Unknown {
+					t = OverrideCastType(v.Value)
+				}
+				obj.SchemaOverride = t
+			}
+		}
+	}
 	{
 		a, ok := tf.Attrs["str"]
 		if !ok {
@@ -4933,6 +4955,28 @@ func CopyTestToTerraform(ctx context.Context, obj *Test, tf *github_com_hashicor
 			}
 		}
 	}
+	{
+		t, ok := tf.AttrTypes["schema_override"]
+		if !ok {
+			diags.Append(attrWriteMissingDiag{"Test.SchemaOverride"})
+		} else {
+			v, ok := tf.Attrs["schema_override"].(github_com_hashicorp_terraform_plugin_framework_types.String)
+			if !ok {
+				i, err := t.ValueFromTerraform(ctx, github_com_hashicorp_terraform_plugin_go_tftypes.NewValue(t.TerraformType(ctx), nil))
+				if err != nil {
+					diags.Append(attrWriteGeneralError{"Test.SchemaOverride", err})
+				}
+				v, ok = i.(github_com_hashicorp_terraform_plugin_framework_types.String)
+				if !ok {
+					diags.Append(attrWriteConversionFailureDiag{"Test.SchemaOverride", "github.com/hashicorp/terraform-plugin-framework/types.String"})
+				}
+				v.Null = string(obj.SchemaOverride) == ""
+			}
+			v.Value = string(obj.SchemaOverride)
+			v.Unknown = false
+			tf.Attrs["schema_override"] = v
+		}
+	}
 	{
 		t, ok := tf.AttrTypes["str"]
 		if !ok {