diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 6b3c329..f4618e7 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -108,7 +108,7 @@
 /*
  * Used with root_device_register() in tcm_loop_alloc_core_bus() below
  */
-struct device *tcm_loop_primary;
+static struct device *tcm_loop_primary;
 
 static void tcm_loop_submission_work(struct work_struct *work)
 {