diff -ur gwave-code-249-trunk.orig/src/xgserver.c gwave-code-249-trunk/src/xgserver.c
--- gwave-code-249-trunk.orig/src/xgserver.c	2016-08-15 13:12:41.694012802 -0600
+++ gwave-code-249-trunk/src/xgserver.c	2016-08-15 13:13:26.810327097 -0600
@@ -22,6 +22,7 @@
 #include <sys/time.h>
 #include <unistd.h>
 #include <signal.h>
+#include <stdlib.h>
 
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>