diff --git a/reactos/drivers/fs/np/fsctrl.c b/reactos/drivers/fs/np/fsctrl.c
index 89539d865d3..cc6ed883072 100644
--- a/reactos/drivers/fs/np/fsctrl.c
+++ b/reactos/drivers/fs/np/fsctrl.c
@@ -18,7 +18,7 @@
 
 /* FUNCTIONS *****************************************************************/
 
-static VOID
+static VOID STDCALL
 NpfsListeningCancelRoutine(IN PDEVICE_OBJECT DeviceObject,
                            IN PIRP Irp)
 {