diff --git a/introspect.py b/introspect.py
index aa9615e..bc657e2 100644
--- a/introspect.py
+++ b/introspect.py
@@ -949,6 +949,7 @@ def _annotation_to_type_str(ann: object) -> str:
     s = ann if isinstance(ann, str) else str(ann)
     # Clean up internal module references
     s = s.replace("_bpy_types.", "bpy.types.")
+    s = s.replace("bpy_types.", "bpy.types.")
     # typing.Union[X, Y] -> X | Y
     s = re.sub(r"\bUnion\[([^\]]+)\]", lambda m: " | ".join(m.group(1).split(", ")), s)
     # typing.Optional[X] -> X | None