diff --git a/lib-src/etags.c b/lib-src/etags.c
index 8463e01443e..ba1ac984156 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -50,6 +50,7 @@ char pot_etags_version[] = "@(#) pot revision number is 11.59";
 # include <stdlib.h>
 # include <fcntl.h>
 # include <string.h>
+# include <io.h>
 # define MAXPATHLEN _MAX_PATH
 #endif