diff --git a/README.md b/README.md
index a3b673c6758..0991d652846 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ pass-thru:
   - subset-reducer
 version: 3.0.6302
 use-extension:
-  "@autorest/modelerfour": "4.15.378"
+  "@autorest/modelerfour": "4.15.400"
 
 modelerfour:
   group-parameters: true
diff --git a/autorest/codegen/models/base_schema.py b/autorest/codegen/models/base_schema.py
index f7ed42e11de..3be72596ee5 100644
--- a/autorest/codegen/models/base_schema.py
+++ b/autorest/codegen/models/base_schema.py
@@ -46,7 +46,7 @@ def xml_serialization_ctxt(self) -> Optional[str]:
             attrs_list.append(f"'prefix': '{self.xml_metadata['prefix']}'")
         if self.xml_metadata.get("namespace", False):
             attrs_list.append(f"'ns': '{self.xml_metadata['namespace']}'")
-        if self.xml_metadata.get("extensions", {}).get("x-ms-text", False):
+        if self.xml_metadata.get("text"):
             attrs_list.append(f"'text': True")
         return ", ".join(attrs_list)