diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index 94223d40..d11541d 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -256,8 +256,7 @@
 	__ui_browser__show_title(browser, title);
 
 	browser->title = title;
-	free(browser->helpline);
-	browser->helpline = NULL;
+	zfree(&browser->helpline);
 
 	va_start(ap, helpline);
 	err = vasprintf(&browser->helpline, helpline, ap);
@@ -272,8 +271,7 @@
 {
 	pthread_mutex_lock(&ui__lock);
 	ui_helpline__pop();
-	free(browser->helpline);
-	browser->helpline = NULL;
+	zfree(&browser->helpline);
 	pthread_mutex_unlock(&ui__lock);
 }