Index: dxf2fig.c
===================================================================
--- dxf2fig.c
+++ dxf2fig.c	2011-05-08 18:05:11.663695189 +0200
@@ -332,7 +332,7 @@
 	   "            -f <0-4>     : papersize , 0=A0, 1=A1, ... , 4=A4\n"
 	   "            -v [-v ...]  : give (lots of) debug information\n"
 	   ,basename);
-   fprintf(stderr,filterhelp());
+   fprintf(stderr,"%s", filterhelp());
    
    exit(1);
 }