diff --git a/compiler/nim.cfg b/compiler/nim.cfg
index 5a30efd6f7..841b72a94d 100644
--- a/compiler/nim.cfg
+++ b/compiler/nim.cfg
@@ -16,3 +16,7 @@ define:nimOldCaseObjects
 
 #define:useNodeIds
 #gc:markAndSweep
+
+@if nimHasWarningCaseTransition:
+warning[CaseTransition]:off
+@end