diff --git a/sys/net/pfil.c b/sys/net/pfil.c
index 4b4eeca362c1..3ceffcefb758 100644
--- a/sys/net/pfil.c
+++ b/sys/net/pfil.c
@@ -295,6 +295,7 @@ pfil_head_unregister(pfil_head_t ph)
 		free(link, M_PFIL);
 	}
 	PFIL_UNLOCK();
+	free(ph, M_PFIL);
 }
 
 pfil_hook_t