diff --git a/honoka-plugins/jsfilter/src/jsproc.cpp b/honoka-plugins/jsfilter/src/jsproc.cpp
index 03bc17e..c204f9f 100644
--- a/honoka-plugins/jsfilter/src/jsproc.cpp
+++ b/honoka-plugins/jsfilter/src/jsproc.cpp
@@ -42,6 +42,27 @@
     JSRuntime *jsrt;
     JSContext *jsct;
     JSObject *jsobj;
+    JSClass jscs;
+    JSProcPriv() {
+        jscs.name = "global";
+        jscs.flags = JSCLASS_NEW_RESOLVE;
+        jscs.addProperty = JS_PropertyStub;
+        jscs.delProperty = JS_PropertyStub;
+        jscs.getProperty = JS_PropertyStub;
+        jscs.setProperty = JS_PropertyStub;
+        jscs.enumerate = enumerate;
+        jscs.resolve = (JSResolveOp)resolve;
+        jscs.convert = JS_ConvertStub;
+        jscs.finalize = JS_FinalizeStub;
+
+    };
+    static JSBool resolve(JSContext *context,JSObject *obj,jsval id,uintN flags,JSObject **objp) {
+        return JS_TRUE;
+    };
+    static JSBool enumerate(JSContext *context,JSObject *obj)
+    {
+        return JS_EnumerateStandardClasses(context,obj);
+    };
 };
 }
 
@@ -51,11 +72,6 @@
     jspriv->jsrt = NULL;
     jspriv->jsct = NULL;
     jspriv->jsobj = NULL;
-    JSClass jscs = {
-        "global",0,
-        JS_PropertyStub,JS_PropertyStub,JS_PropertyStub,JS_PropertyStub,
-        JS_EnumerateStub,JS_ResolveStub,JS_ConvertStub,JS_FinalizeStub
-    };
     
     int fd = open(filename.c_str(),O_RDONLY);
     if (fd == -1) return;
@@ -70,7 +86,7 @@
         jspriv->jsrt = NULL;
         return;
     }
-    jspriv->jsobj = JS_NewObject(jspriv->jsct, &jscs, NULL, NULL);
+    jspriv->jsobj = JS_NewObject(jspriv->jsct,&jspriv->jscs, NULL, NULL);
     if (!jspriv->jsobj) {
         JS_DestroyContext(jspriv->jsct);
         jspriv->jsct = NULL;
@@ -120,8 +136,9 @@
     if (!jspriv->jsct) return string();
     jsval rval;
     JSString *str;
-    uintN lino;
-    if (!JS_EvaluateScript(jspriv->jsct,jspriv->jsobj,script.c_str(),strlen(script.c_str()),"script",lino, &rval)) {
+    char fn[] = "(inline)";
+    uintN lino = 0;
+    if (!JS_EvaluateScript(jspriv->jsct,jspriv->jsobj,script.c_str(),strlen(script.c_str()),fn,lino, &rval)) {
         return string();
     }
     str = JS_ValueToString(jspriv->jsct,rval);