diff --git a/reactos/ntoskrnl/io/iomgr/irp.c b/reactos/ntoskrnl/io/iomgr/irp.c
index 894f8f4156c..723ec0551fd 100644
--- a/reactos/ntoskrnl/io/iomgr/irp.c
+++ b/reactos/ntoskrnl/io/iomgr/irp.c
@@ -1245,7 +1245,7 @@ IofCompleteRequest(IN PIRP Irp,
     PIRP MasterIrp;
     ULONG Flags;
     NTSTATUS ErrorCode = STATUS_SUCCESS;
-    PREPARSE_DATA_BUFFER DataBuffer;
+    PREPARSE_DATA_BUFFER DataBuffer = NULL;
     IOTRACE(IO_IRP_DEBUG,
             "%s - Completing IRP %p\n",
             __FUNCTION__,