diff --git a/include/ntddstor.h b/include/ntddstor.h
index d38a9471d4a..b8c4bb73b0d 100644
--- a/include/ntddstor.h
+++ b/include/ntddstor.h
@@ -68,7 +68,7 @@ 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,
+DEFINE_GUID(StoragePortClassGuid,
   0x2accfe60, 0xc130, 0x11d2, 0xb0, 0x82, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
 
 typedef struct _STORAGE_DEVICE_NUMBER {