diff -ru libstroke-0.5.1.orig/libstroke/stroke.c libstroke-0.5.1/libstroke/stroke.c
--- libstroke-0.5.1.orig/libstroke/stroke.c	2001-07-06 06:32:42.000000000 +0200
+++ libstroke-0.5.1/libstroke/stroke.c	2005-09-22 18:27:25.000000000 +0200
@@ -12,6 +12,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <math.h>
+#include <string.h>
 
 #ifdef STROKE_MOUSE_FOOTPRINTS
 #include <X11/Xutil.h>