diff --git a/runtime/tools/python/ttrt/common/util.py b/runtime/tools/python/ttrt/common/util.py
index 572b728fa8..5f378329fb 100644
--- a/runtime/tools/python/ttrt/common/util.py
+++ b/runtime/tools/python/ttrt/common/util.py
@@ -559,7 +559,7 @@ def get_file_extension():
 
 
 class BinaryTTMetal(Binary):
-    file_extension = ".ttb"
+    file_extension = ".ttm"
 
     def __int__(self, logger, file_manager, file_path):
         super().__init__(logger, file_manager, file_path)