diff --git a/tools/ci/check_build_warnings.py b/tools/ci/check_build_warnings.py
index 73538ebda9..4936acb989 100755
--- a/tools/ci/check_build_warnings.py
+++ b/tools/ci/check_build_warnings.py
@@ -25,6 +25,7 @@ IGNORE_WARNS = [
         r'library/error\.o',
         r'/.*error\S*\.o',
         r'.*error.*\.c\.obj',
+        r'.*error.*\.c',
         r'.*error.*\.cpp\.obj',
         r'.*error.*\.cxx\.obj',
         r'.*error.*\.cc\.obj',