diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 2854b66eb748..8154d110dd07 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -6652,6 +6652,7 @@ void msr_sum_record(void)
 	timer_delete(timerid);
 release_msr:
 	free(per_cpu_msr_sum);
+	per_cpu_msr_sum = NULL;
 }
 
 /*