diff --git a/lib/lockref.c b/lib/lockref.c
index e2cd2c0..8ff162f 100644
--- a/lib/lockref.c
+++ b/lib/lockref.c
@@ -136,6 +136,7 @@
 	assert_spin_locked(&lockref->lock);
 	lockref->count = -128;
 }
+EXPORT_SYMBOL(lockref_mark_dead);
 
 /**
  * lockref_get_not_dead - Increments count unless the ref is dead