diff --git a/client/mysqltest.cc b/client/mysqltest.cc
index 3812a1bb8d1..9e8f31178ad 100644
--- a/client/mysqltest.cc
+++ b/client/mysqltest.cc
@@ -1535,7 +1535,7 @@ void show_diff(DYNAMIC_STRING* ds,
   else
     diff_name = 0;
 #else
-  diff_name = "diff";		// Otherwise always assume it's called diff
+  diff_name = "diff";           /* Otherwise always assume it's called diff */
 #endif
 
   if (diff_name)