diff --git a/src/vim.h b/src/vim.h
index 8636c56..b1faf23 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -487,6 +487,9 @@
 # include <errno.h>
 #endif
 
+/* for INT_MAX et al. */
+#include <limits.h>
+
 /*
  * Allow other (non-unix) systems to configure themselves now
  * These are also in os_unix.h, because osdef.sh needs them there.