diff --git a/config/nim.cfg b/config/nim.cfg
index 40e0055de..7c2e0246d 100644
--- a/config/nim.cfg
+++ b/config/nim.cfg
@@ -273,3 +273,10 @@ tcc.options.always = "-w"
     gcc.cpp.linkerexe = "genode-arm-ld"
   @end
 @end
+
+@if nimv019:
+  --multimethods:on
+  --oldAst:on
+  --define:nimOldCaseObjects
+  --define:oldShiftRight
+@end