diff --git a/include/ntddstor.h b/include/ntddstor.h
index 4ae63086238..a1dbf49658f 100644
--- a/include/ntddstor.h
+++ b/include/ntddstor.h
@@ -41,6 +41,27 @@ extern "C" {
 #define IOCTL_STORAGE_GET_DEVICE_NUMBER CTL_CODE(IOCTL_STORAGE_BASE, 0x0420, METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define IOCTL_STORAGE_QUERY_PROPERTY    CTL_CODE(IOCTL_STORAGE_BASE, 0x0500, METHOD_BUFFERED, FILE_ANY_ACCESS)
 
+DEFINE_GUID(DiskClassGuid,
+  0x53f56307, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(CdRomClassGuid,
+  0x53f56308, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(PartitionClassGuid,
+  0x53f5630a, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(TapeClassGuid,
+  0x53f5630b, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(WriteOnceDiskClassGuid,
+  0x53f5630c, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(VolumeClassGuid,
+  0x53f5630d, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(MediumChangerClassGuid,
+  0x53f56310, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(FloppyClassGuid,
+  0x53f56311, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(CdChangerClassGuid,
+  0x53f56312, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+DEFINE_GUID(StroagePortClassGuid,
+  0x2accfe60, 0xc130, 0x11d2, 0xb0, 0x82, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
+
 typedef struct _STORAGE_DEVICE_NUMBER {
     DEVICE_TYPE         DeviceType;
     ULONG               DeviceNumber;