--- a/src/controller.c
+++ b/src/controller.c
@@ -24,6 +24,7 @@
 #include "settings.h"
 #include "tools.h"
 #include "lib/florence.h"
+#include <sys/wait.h>
 #include <cairo-xlib.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
@@ -46,7 +47,7 @@
 	cairo_paint(context);
 	cairo_set_operator(context, CAIRO_OPERATOR_SOURCE);
 	style_render_svg(context, handle, w, h, FALSE, NULL);
-	wait();
+	wait(NULL);
 	END_FUNC
 }