diff --git a/fieldapi.go b/fieldapi.go
index 25a6615..351e78d 100644
--- a/fieldapi.go
+++ b/fieldapi.go
@@ -71,7 +71,7 @@ func Float[T ~float32 | ~float64](key string, val T) Field {
 }
 
 // String constructs a field containing a key and String value.
-func String[T ~string](key string, val T) Field {
+func String[T ~string | ~[]byte](key string, val T) Field {
 	return Field{Key: key, Type: StringType, String: string(val)}
 }
 
diff --git a/fieldapi_test.go b/fieldapi_test.go
index 465ba5d..0cbfdb3 100644
--- a/fieldapi_test.go
+++ b/fieldapi_test.go
@@ -68,6 +68,10 @@ func TestFieldString(t *testing.T) {
 	_ = String("string", "foo")
 	type myString string
 	_ = String("string", myString("foo"))
+
+	type myByteSlice string
+	_ = String("string", []byte{})
+	_ = String("string", myByteSlice([]byte{}))
 }
 
 func TestFieldStringer(t *testing.T) {