diff --git a/src/PluginManager.cpp b/src/PluginManager.cpp
index 611f12ae5..be4deaf50 100644
--- a/src/PluginManager.cpp
+++ b/src/PluginManager.cpp
@@ -1346,14 +1346,17 @@ void PluginDescriptor::SetImporterExtensions(const wxArrayString & extensions)
 //
 // ============================================================================
 
-bool PluginManager::IsPluginRegistered(const PluginID & ID)
+bool PluginManager::IsPluginRegistered(const wxString & path)
 {
-   if (mPlugins.find(ID) == mPlugins.end())
+   for (PluginMap::iterator iter = mPlugins.begin(); iter != mPlugins.end(); ++iter)
    {
-      return false;
+      if (iter->second.GetPath().IsSameAs(path))
+      {
+         return true;
+      }
    }
 
-   return true;
+   return false;
 }
 
 const PluginID & PluginManager::RegisterPlugin(ModuleInterface *module)
diff --git a/src/PluginManager.h b/src/PluginManager.h
index 4c18c2f0d..5b7b61f83 100644
--- a/src/PluginManager.h
+++ b/src/PluginManager.h
@@ -172,7 +172,7 @@ public:
 
    // PluginManagerInterface implementation
 
-   virtual bool IsPluginRegistered(const PluginID & ID);
+   virtual bool IsPluginRegistered(const wxString & path);
 
    virtual const PluginID & RegisterPlugin(ModuleInterface *module);
    virtual const PluginID & RegisterPlugin(ModuleInterface *provider, EffectIdentInterface *effect);
diff --git a/src/effects/LoadEffects.cpp b/src/effects/LoadEffects.cpp
index fc171765b..614f47f14 100644
--- a/src/effects/LoadEffects.cpp
+++ b/src/effects/LoadEffects.cpp
@@ -288,11 +288,11 @@ bool BuiltinEffectsModule::AutoRegisterPlugins(PluginManagerInterface & pm)
 {
    for (size_t i = 0; i < WXSIZEOF(kEffectNames); i++)
    {
-      PluginID ID(wxString(BUILTIN_EFFECT_PREFIX) + kEffectNames[i]);
+      wxString path(wxString(BUILTIN_EFFECT_PREFIX) + kEffectNames[i]);
 
-      if (!pm.IsPluginRegistered(ID))
+      if (!pm.IsPluginRegistered(path))
       {
-         RegisterPlugin(pm, ID);
+         RegisterPlugin(pm, path);
       }
    }