diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index a835d3bc1a9..d3f6c771a7c 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -5007,7 +5007,7 @@ sub valgrind_arguments {
   }
 
   # Add valgrind options, can be overriden by user
-  mtr_add_arg($args, '%s', $_) for (split(' ', $opt_valgrind_options));
+  mtr_add_arg($args, '%s', $opt_valgrind_options);
 
   mtr_add_arg($args, $$exe);