diff --git a/js/src/jsopcode.c b/js/src/jsopcode.c
index f08f97ec0d30..197619f16fbc 100644
--- a/js/src/jsopcode.c
+++ b/js/src/jsopcode.c
@@ -2564,7 +2564,7 @@ Decompile(SprintStack *ss, jsbytecode *pc, intN nb)
 
               case JSOP_DEFXMLNS:
                 rval = POP_STR();
-                js_printf(jp, "\t%s %s %s %s;\n",
+                js_printf(jp, "\t%s %s %s = %s;\n",
                           js_default_str, js_xml_str, js_namespace_str, rval);
                 todo = -2;
                 break;