diff --git a/frontend/apps/reader/modules/readerdictionary.lua b/frontend/apps/reader/modules/readerdictionary.lua
index b2cff0be0..e1ee8d2f7 100644
--- a/frontend/apps/reader/modules/readerdictionary.lua
+++ b/frontend/apps/reader/modules/readerdictionary.lua
@@ -112,6 +112,7 @@ function ReaderDictionary:onReadSettings(config)
 end
 
 function ReaderDictionary:onSaveSettings()
+    DEBUG("save default dictionary", self.default_dictionary)
     self.ui.doc_settings:saveSetting("default_dictionary", self.default_dictionary)
 end
 
diff --git a/frontend/apps/reader/modules/readerwikipedia.lua b/frontend/apps/reader/modules/readerwikipedia.lua
index ce34f8f31..53bf31f8c 100644
--- a/frontend/apps/reader/modules/readerwikipedia.lua
+++ b/frontend/apps/reader/modules/readerwikipedia.lua
@@ -65,4 +65,8 @@ function ReaderWikipedia:onLookupWikipedia(word, box)
     end
 end
 
+-- override onSaveSettings in ReaderDictionary
+function ReaderWikipedia:onSaveSettings()
+end
+
 return ReaderWikipedia