diff --git a/lib/libdom/domattr.c b/lib/libdom/domattr.c
index 7c856f15aec6..86ed4a86e35d 100644
--- a/lib/libdom/domattr.c
+++ b/lib/libdom/domattr.c
@@ -72,7 +72,7 @@ DOM_NewAttributeObject(JSContext *cx, DOM_Attribute *attr)
         return NULL;
     }
 
-    str = JS_InternString(cx, node->name);
+    str = JS_NewStringCopyZ, node->name);
     v = STRING_TO_JSVAL(str);
     if (!str ||
         !JS_SetProperty(cx, obj, "name", &v))
diff --git a/lib/libdom/domelement.c b/lib/libdom/domelement.c
index e1d4e19374d9..4cdfc4137589 100644
--- a/lib/libdom/domelement.c
+++ b/lib/libdom/domelement.c
@@ -106,7 +106,7 @@ element_getAttribute(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
     value = element->ops->getAttribute(cx, element, JS_GetStringBytes(name),
                                        &cache);
     if (value) {
-        *rval = STRING_TO_JSVAL(JS_InternString(cx, value));
+        *rval = STRING_TO_JSVAL(JS_NewStringCopyZ(cx, value));
         if (!JSVAL_TO_STRING(*rval))
             return JS_FALSE;
     } else {