--- a/xmountains.c
+++ b/xmountains.c
@@ -1,7 +1,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <strings.h>
+#include <string.h>
 #include <signal.h>
 #include <sys/types.h>
 #include <unistd.h>