diff --git a/include/audacity/EffectInterface.h b/include/audacity/EffectInterface.h
index 815ecff1a..0d6d30773 100644
--- a/include/audacity/EffectInterface.h
+++ b/include/audacity/EffectInterface.h
@@ -51,11 +51,11 @@
 
 typedef enum EffectType
 {
-   EffectTypeNone =1,
-   EffectTypeGenerate =2,
-   EffectTypeProcess =4,
-   EffectTypeAnalyze =8,
-   EffectTypeAll = 15
+   EffectTypeNone,
+   EffectTypeHidden,
+   EffectTypeGenerate,
+   EffectTypeProcess,
+   EffectTypeAnalyze
 } EffectType;
 
 class AUDACITY_DLL_API EffectIdentInterface : public IdentInterface
diff --git a/src/PluginManager.h b/src/PluginManager.h
index 9118d8549..55cf2b79a 100644
--- a/src/PluginManager.h
+++ b/src/PluginManager.h
@@ -256,7 +256,7 @@ public:
    wxString GetName(const PluginID & ID);
    IdentInterface *GetInstance(const PluginID & ID);
 
-   void CheckForUpdates(EffectType Type=EffectTypeAll);
+   void CheckForUpdates(EffectType Type=EffectTypeNone);
 
    // Here solely for the purpose of Nyquist Workbench until
    // a better solution is devised.
diff --git a/src/effects/StereoToMono.cpp b/src/effects/StereoToMono.cpp
index 42efc0f0c..d45c85e9a 100644
--- a/src/effects/StereoToMono.cpp
+++ b/src/effects/StereoToMono.cpp
@@ -46,7 +46,7 @@ wxString EffectStereoToMono::GetDescription()
 EffectType EffectStereoToMono::GetType()
 {
    // Really EffectTypeProcess, but this prevents it from showing in the Effect Menu
-   return EffectTypeNone;
+   return EffectTypeHidden;
 }
 
 bool EffectStereoToMono::IsInteractive()