diff --git a/block/blk-core.c b/block/blk-core.c
index e9754dc..c013ca2 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -38,7 +38,7 @@
 /*
  * For the allocated request tables
  */
-struct kmem_cache *request_cachep;
+static struct kmem_cache *request_cachep;
 
 /*
  * For queue allocation