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-rw-r--r--src/vimio.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/vimio.h b/src/vimio.h
index 71a52cd21..a4dd03096 100644
--- a/src/vimio.h
+++ b/src/vimio.h
@@ -13,4 +13,7 @@
# define _CRT_NONSTDC_NO_DEPRECATE
#endif
-#include <io.h>
+/* cproto fails on missing include files */
+#ifndef PROTO
+# include <io.h>
+#endif