diff --git a/drivers/oprofile/event_buffer.c b/drivers/oprofile/event_buffer.c
index e7fbac5..8d692a5 100644
--- a/drivers/oprofile/event_buffer.c
+++ b/drivers/oprofile/event_buffer.c
@@ -93,6 +93,8 @@
 void free_event_buffer(void)
 {
 	vfree(event_buffer);
+
+	event_buffer = NULL;
 }