diff --git a/src/util/gamedata.c b/src/util/gamedata.c
index 3ac892430..e7ac22b6c 100644
--- a/src/util/gamedata.c
+++ b/src/util/gamedata.c
@@ -8,6 +8,7 @@
 #include <memstream.h>
 #include <binarystore.h>
 
+#include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>