diff --git a/lib/system/mmdisp.nim b/lib/system/mmdisp.nim
index a3772ba371..ce935ff8af 100644
--- a/lib/system/mmdisp.nim
+++ b/lib/system/mmdisp.nim
@@ -38,7 +38,7 @@ type
   PByte = ptr ByteArray
   PString = ptr string
 
-when not (defined(gcOrc) or defined(gcArc) or defined(gcAtomicArc)):
+when not defined(nimV2):
   type
     RefCount = int