diff --git a/include/pocketpy/config.h b/include/pocketpy/config.h
index 44b1c388..aaccb965 100644
--- a/include/pocketpy/config.h
+++ b/include/pocketpy/config.h
@@ -73,6 +73,7 @@
 #pragma warning (disable:4100)
 #pragma warning (disable:4244)
 #pragma warning (disable:4996)
+#pragma warning (disable:4018)
 #endif
 
 #ifdef _MSC_VER