diff --git a/WINGs/wfilepanel.c b/WINGs/wfilepanel.c
index 4c5970dd..6f03cd47 100644
--- a/WINGs/wfilepanel.c
+++ b/WINGs/wfilepanel.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <dirent.h>
 #include <limits.h>
+#include <errno.h>
 
 #ifndef PATH_MAX
 #define PATH_MAX 1024