diff --git a/tools/scripts/approvalTests.py b/tools/scripts/approvalTests.py
index f8b9425c7c..73e9b83239 100755
--- a/tools/scripts/approvalTests.py
+++ b/tools/scripts/approvalTests.py
@@ -44,7 +44,7 @@
 
 # errno macro expands into various names depending on platform, so we need to fix them up as well
 errnoParser = re.compile(r'''
-    \(\*__errno_location\ \(\)\)
+    \(\*__errno_location\s*\(\)\)
     |
     \(\*__error\(\)\)
     |