diff --git a/dll/win32/oleaut32/oleaut.c b/dll/win32/oleaut32/oleaut.c
index 87606bbf344..7620fcc8f9e 100644
--- a/dll/win32/oleaut32/oleaut.c
+++ b/dll/win32/oleaut32/oleaut.c
@@ -659,12 +659,15 @@ ULONG WINAPI OaBuildVersion(void)
     case 0x00000004:  /* NT40 */
     case 0x00000005:  /* W2K */
 		return MAKELONG(0xffff, 40);
+#ifdef __REACTOS__
+    case 0x00000205:  /* ReactOS */
+#endif
     case 0x00000105:  /* WinXP */
     case 0x00000006:  /* Vista */
     case 0x00000106:  /* Win7 */
 		return MAKELONG(0xffff, 50);
     default:
 		return MAKELONG(0xffff, 40);  /* for now return the same value as for w2k */
     }
 }