diff --git a/ras-events.c b/ras-events.c
index 39cab20..319f049 100644
--- a/ras-events.c
+++ b/ras-events.c
@@ -328,7 +328,7 @@ static void parse_ras_data(struct pthread_data *pdata, struct kbuffer *kbuf,
 
 static int get_num_cpus(struct ras_events *ras)
 {
-	return sysconf(_SC_NPROCESSORS_CONF);
+	return sysconf(_SC_NPROCESSORS_ONLN);
 #if 0
 	char fname[MAX_PATH + 1];
 	int num_cpus = 0;