diff --git a/reactos/drivers/lib/csq/csq.c b/reactos/drivers/lib/csq/csq.c
index 388ed3300c7..29c28cc09dc 100644
--- a/reactos/drivers/lib/csq/csq.c
+++ b/reactos/drivers/lib/csq/csq.c
@@ -30,7 +30,7 @@
 #include <ddk/csq.h>
 
 
-VOID NTAPI IopCsqCancelRoutine(PDEVICE_OBJECT DeviceObject,
+static VOID NTAPI IopCsqCancelRoutine(PDEVICE_OBJECT DeviceObject,
                                PIRP Irp)
 /*
  * FUNCTION: Cancel routine that is installed on any IRP that this library manages