diff --git a/lldb/test/API/lang/c/calling-conventions/TestCCallingConventions.py b/lldb/test/API/lang/c/calling-conventions/TestCCallingConventions.py
index 6fd60c22cea4f..f37331e2cd254 100644
--- a/lldb/test/API/lang/c/calling-conventions/TestCCallingConventions.py
+++ b/lldb/test/API/lang/c/calling-conventions/TestCCallingConventions.py
@@ -20,7 +20,7 @@ def build_and_run(self, test_file):
         try:
             self.build(dictionary={
                 "C_SOURCES" : test_file,
-                "CFLAGS_EXTRAS" : "-Werror"
+                "CFLAGS_EXTRAS" : "-Werror=ignored-attributes"
             })
         except BuildError as e:
              # Test source failed to build. Check if it failed because the