diff --git a/src/Kiota.Builder/Writers/Python/CodeMethodWriter.cs b/src/Kiota.Builder/Writers/Python/CodeMethodWriter.cs
index f45485501b..a965b810d2 100644
--- a/src/Kiota.Builder/Writers/Python/CodeMethodWriter.cs
+++ b/src/Kiota.Builder/Writers/Python/CodeMethodWriter.cs
@@ -812,8 +812,8 @@ private string GetSerializationMethodName(CodeTypeBase propType)
     private string GetTypeFactory(bool isVoid, bool isStream, string returnType)
     {
         if (isVoid) return string.Empty;
-        if (isStream || conventions.IsPrimitiveType(returnType)) return $" {returnType},";
-
+        if (isStream) return $" \"{returnType}\",";
+        if (conventions.IsPrimitiveType(returnType)) return $" {returnType},";
         return $" {returnType},";
     }
     private string GetSendRequestMethodName(bool isVoid, bool isStream, bool isCollection, string returnType,
diff --git a/tests/Kiota.Builder.Tests/Writers/Python/CodeMethodWriterTests.cs b/tests/Kiota.Builder.Tests/Writers/Python/CodeMethodWriterTests.cs
index 4f041e666d..b74c4786c4 100644
--- a/tests/Kiota.Builder.Tests/Writers/Python/CodeMethodWriterTests.cs
+++ b/tests/Kiota.Builder.Tests/Writers/Python/CodeMethodWriterTests.cs
@@ -824,7 +824,7 @@ public void WritesUnionDeSerializerBody()
     }
     [Theory]
     [InlineData(true, false, "string", "")]
-    [InlineData(false, true, "Stream", " Stream,")]
+    [InlineData(false, true, "Stream", " \"Stream\",")]
     [InlineData(false, false, "int", " int,")]
     [InlineData(false, false, "CustomType", " CustomType,")]
     public void GetTypeFactory_ReturnsCorrectString(bool isVoid, bool isStream, string returnType, string expected)