--- hashcash-1.16/hashcash.c	2005-01-16 00:07:18.000000000 +0000
+++ hashcash-1.16/hashcash.c	2005-03-01 10:14:11.146945576 +0000
@@ -579,7 +579,7 @@ 
 		    fprintf(stderr,"out of memory\n");
 		    exit( EXIT_FAILURE );
 		}
-		fprintf( stdout, header_wrapped );
+		fprintf( stdout, "%s", header_wrapped );
 		free( header_wrapped );
 	    } else { 
 		fprintf( stdout, "%s%s\n",