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-rw-r--r--config/config.nims5
1 files changed, 4 insertions, 1 deletions
diff --git a/config/config.nims b/config/config.nims
index 3f0d9e1b8..03daa5970 100644
--- a/config/config.nims
+++ b/config/config.nims
@@ -1 +1,4 @@
-# empty config.nims to prevent future regressions, see #9990
+# this config.nims also needs to exist to prevent future regressions, see #9990
+
+when defined(nimHasCppDefine):
+  cppDefine "errno"