diff --git a/src/kernel/core/device_manager/nodes.c b/src/kernel/core/device_manager/nodes.c
index a652a0ee41..62f3b987ad 100644
--- a/src/kernel/core/device_manager/nodes.c
+++ b/src/kernel/core/device_manager/nodes.c
@@ -37,6 +37,9 @@
 #endif
 
 
+benaphore gNodeLock;
+
+
 // increase ref_count of node
 
 void