diff --git a/.clang-tidy b/.clang-tidy
index 8597ea5c13..1f37003f8e 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -17,4 +17,4 @@ CheckOptions:
 - key: readability-identifier-naming.NamespaceCase
   value: CamelCase
 - key: readability-identifier-naming.NamespaceIgnoredRegexp
-  value: 'osg(DB|FX|Particle|Shadow|Viewer|Util)?'
+  value: 'bpo|osg(DB|FX|Particle|Shadow|Viewer|Util)?'