diff --git a/lib/system/atomics.nim b/lib/system/atomics.nim
index 885b01621b..8c3801687d 100644
--- a/lib/system/atomics.nim
+++ b/lib/system/atomics.nim
@@ -172,7 +172,7 @@ elif defined(vcc) and hasThreadSupport:
         header: "<intrin.h>".}
     else:
       proc addAndFetch*(p: ptr int, val: int): int {.
-        importcpp: "_InterlockedExchangeAdd(static_cast<NI volatile *>(#), #)",
+        importcpp: "_InterlockedExchangeAdd(reinterpret_cast<LONG volatile *>(#), static_cast<LONG>(#))",
         header: "<intrin.h>".}
   else:
     when sizeof(int) == 8: