diff --git a/reactos/include/ddk/csq.h b/reactos/include/ddk/csq.h
index 99056f610a8..cf7b2c14ce3 100644
--- a/reactos/include/ddk/csq.h
+++ b/reactos/include/ddk/csq.h
@@ -229,9 +229,11 @@ typedef struct _IO_CSQ_IRP_CONTEXT {
 	}
  *
  */
+#ifndef IO_TYPE_CSQ_EX
 typedef NTSTATUS (NTAPI *PIO_CSQ_INSERT_IRP_EX) (struct _IO_CSQ *Csq,
                                                  PIRP Irp,
                                                  PVOID InsertContext);
+#endif
 
 /*
  * CANCEL-SAFE QUEUE DDIs
diff --git a/reactos/include/ddk/wdm.h b/reactos/include/ddk/wdm.h
index 3308de9c286..4dd5ae3abc9 100644
--- a/reactos/include/ddk/wdm.h
+++ b/reactos/include/ddk/wdm.h
@@ -5191,6 +5191,13 @@ typedef VOID
   IN struct _IO_CSQ  *Csq,
   IN PIRP  Irp);
 
+typedef NTSTATUS
+(NTAPI IO_CSQ_INSERT_IRP_EX)(
+  IN struct _IO_CSQ *Csq,
+  IN PIRP Irp,
+  IN PVOID InsertContext);
+typedef IO_CSQ_INSERT_IRP_EX *PIO_CSQ_INSERT_IRP_EX;
+
 typedef VOID
 (NTAPI *PIO_CSQ_REMOVE_IRP)(
   IN struct _IO_CSQ  *Csq,