diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index a1e02a56164..5e61b4f1867 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -2022,7 +2022,7 @@ sub read_plugin_defs($)
 
   # Need to check if we will be running mysqld-debug
   if ($opt_debug_server) {
-    $running_debug= 1 if find_mysqld($basedir) =~ /-debug$/;
+    $running_debug= 1 if find_mysqld($basedir) =~ /mysqld-debug/;
   }
 
   while (<PLUGDEF>) {