diff --git a/tools/ci/check_build_warnings.py b/tools/ci/check_build_warnings.py
index 285492d59..738d3f299 100755
--- a/tools/ci/check_build_warnings.py
+++ b/tools/ci/check_build_warnings.py
@@ -18,7 +18,7 @@ except ImportError:
     sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
     from find_build_apps import BuildItem, setup_logging
 
-WARNING_REGEX = r"error|warning"
+WARNING_REGEX = r"^\s+(?:error|warning)"
 
 IGNORE_WARNS = [
     re.compile(r_str) for r_str in [