diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 9480d99..d14a458 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -376,7 +376,7 @@
 		free(pp->args);
 	for (i = 0; i < pp->found; i++)
 		free(pp->probes[i]);
-	memset(pp, 0, sizeof(pp));
+	memset(pp, 0, sizeof(*pp));
 }
 
 /* Show an event */