diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 4d9028e..de16a77 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1503,8 +1503,7 @@
 	int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
 	char s = print_oneline ? ' ' : '\t';
 
-	if (perf_event__preprocess_sample(event, machine, &al, sample,
-					  NULL) < 0) {
+	if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
 		error("problem processing %d event, skipping it.\n",
 			event->header.type);
 		return;