diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index f012395d16fb286f347346706e9c32217f15a9f6..16da20c552bc4de5c5f13ce702ffe7cf15211b0f 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -2076,7 +2076,7 @@ process_fields(struct event_format *event, struct print_flag_sym **list, char **
 			goto out_free;
 
 		field = malloc_or_die(sizeof(*field));
-		memset(field, 0, sizeof(field));
+		memset(field, 0, sizeof(*field));
 
 		value = arg_eval(arg);
 		field->value = strdup(value);