diff --git a/src_main/core/pibase.h b/src_main/core/pibase.h
index 5ca56d7a..452f0323 100644
--- a/src_main/core/pibase.h
+++ b/src_main/core/pibase.h
@@ -134,6 +134,7 @@
 #    endif
 #    ifdef MAC_OS
 #      pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#      pragma GCC diagnostic ignored "-Wundefined-bool-conversion"
 #      pragma GCC diagnostic ignored "-Wc++11-extensions"
 #    endif
 #  endif