diff -p -up gjs-0.3/modules/console.c~ gjs-0.3/modules/console.c
--- gjs-0.3/modules/console.c~	2009-05-02 02:14:04.000000000 +0200
+++ gjs-0.3/modules/console.c	2009-07-05 21:17:52.000000000 +0200
@@ -147,7 +147,7 @@ static JSBool
 gjs_console_readline(JSContext *cx, char *bufp, FILE *file, const char *prompt)
 {
     char line[256];
-    fprintf(stdout, prompt);
+    fprintf(stdout, "%s", prompt);
     fflush(stdout);
     if (!fgets(line, sizeof line, file))
         return JS_FALSE;