diff --git a/reactos/include/ddk/winddi.h b/reactos/include/ddk/winddi.h
index 20ceb16e11a..8487605bca7 100644
--- a/reactos/include/ddk/winddi.h
+++ b/reactos/include/ddk/winddi.h
@@ -429,6 +429,7 @@ typedef struct _DRVFN {
 #define DDI_DRIVER_VERSION_SP3            0x00020003
 #define DDI_DRIVER_VERSION_NT5            0x00030000
 #define DDI_DRIVER_VERSION_NT5_01         0x00030100
+#define DDI_DRIVER_VERSION_NT5_01_SP1     0x00030101
 
 typedef struct _DRVENABLEDATA {
   ULONG  iDriverVersion;