diff --git a/lib/system/chcks.nim b/lib/system/chcks.nim
index 8c7c957958ff..a404e9d40b33 100644
--- a/lib/system/chcks.nim
+++ b/lib/system/chcks.nim
@@ -29,7 +29,7 @@ proc raiseFieldError(f: string) {.compilerproc, noinline.} =
   ## remove after bootstrap > 1.5.1
   sysFatal(FieldDefect, f)
 
-when defined(gcdestructors):
+when defined(nimV2):
   proc raiseFieldError2(f: string, discVal: int) {.compilerproc, noinline.} =
     ## raised when field is inaccessible given runtime value of discriminant
     sysFatal(FieldError, f & $discVal & "'")