1 files changed, 1 insertions, 1 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index d41e0c3552..0e9d64f0d7 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -757,7 +757,7 @@ SRC
 /*top*/
 #ifndef #{macro}
 # error
->>>>>> #{macro} undefined <<<<<<
+|:/ === #{macro} undefined === /:|
 #endif
 SRC
   end