diff --git a/packages/react-native-codegen/src/generators/modules/GenerateModuleJavaSpec.js b/packages/react-native-codegen/src/generators/modules/GenerateModuleJavaSpec.js
index aff908ec83c..8497bb68a84 100644
--- a/packages/react-native-codegen/src/generators/modules/GenerateModuleJavaSpec.js
+++ b/packages/react-native-codegen/src/generators/modules/GenerateModuleJavaSpec.js
@@ -184,7 +184,7 @@ function translateFunctionParamToJavaType(
       imports.add('com.facebook.react.bridge.Callback');
       return wrapNullable('Callback');
     default:
-      (realTypeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (realTypeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(createErrorMessage(realTypeAnnotation.type));
   }
 }
@@ -272,7 +272,7 @@ function translateFunctionReturnTypeToJavaType(
       imports.add('com.facebook.react.bridge.WritableArray');
       return wrapNullable('WritableArray');
     default:
-      (realTypeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (realTypeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(createErrorMessage(realTypeAnnotation.type));
   }
 }
@@ -346,7 +346,7 @@ function getFalsyReturnStatementFromReturnType(
     case 'ArrayTypeAnnotation':
       return 'return null;';
     default:
-      (realTypeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (realTypeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(createErrorMessage(realTypeAnnotation.type));
   }
 }
diff --git a/packages/react-native-codegen/src/generators/modules/GenerateModuleJniCpp.js b/packages/react-native-codegen/src/generators/modules/GenerateModuleJniCpp.js
index 1c825918fbb..ad23221bc4c 100644
--- a/packages/react-native-codegen/src/generators/modules/GenerateModuleJniCpp.js
+++ b/packages/react-native-codegen/src/generators/modules/GenerateModuleJniCpp.js
@@ -193,7 +193,7 @@ function translateReturnTypeToKind(
     case 'ArrayTypeAnnotation':
       return 'ArrayKind';
     default:
-      (realTypeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (realTypeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(
         `Unknown prop type for returning value, found: ${realTypeAnnotation.type}"`,
       );
@@ -272,7 +272,7 @@ function translateParamTypeToJniType(
     case 'FunctionTypeAnnotation':
       return 'Lcom/facebook/react/bridge/Callback;';
     default:
-      (realTypeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (realTypeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(
         `Unknown prop type for method arg, found: ${realTypeAnnotation.type}"`,
       );
@@ -348,7 +348,7 @@ function translateReturnTypeToJniType(
     case 'ArrayTypeAnnotation':
       return 'Lcom/facebook/react/bridge/WritableArray;';
     default:
-      (realTypeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (realTypeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(
         `Unknown prop type for method return type, found: ${realTypeAnnotation.type}"`,
       );
diff --git a/packages/react-native-codegen/src/generators/modules/GenerateModuleObjCpp/serializeMethod.js b/packages/react-native-codegen/src/generators/modules/GenerateModuleObjCpp/serializeMethod.js
index 2894de5ccf2..32a13879c94 100644
--- a/packages/react-native-codegen/src/generators/modules/GenerateModuleObjCpp/serializeMethod.js
+++ b/packages/react-native-codegen/src/generators/modules/GenerateModuleObjCpp/serializeMethod.js
@@ -375,7 +375,7 @@ function getReturnObjCType(
     case 'GenericObjectTypeAnnotation':
       return wrapIntoNullableIfNeeded('NSDictionary *');
     default:
-      (typeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (typeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(
         `Unsupported return type for ${methodName}. Found: ${typeAnnotation.type}`,
       );
@@ -439,7 +439,7 @@ function getReturnJSType(
           );
       }
     default:
-      (typeAnnotation.type: 'EnumDeclaration' | 'MixedTypeAnnotation');
+      (typeAnnotation.type: 'MixedTypeAnnotation');
       throw new Error(
         `Unsupported return type for ${methodName}. Found: ${typeAnnotation.type}`,
       );