diff --git a/frontend/apps/reader/readerui.lua b/frontend/apps/reader/readerui.lua
index 55ec3a190..b058b2a7f 100644
--- a/frontend/apps/reader/readerui.lua
+++ b/frontend/apps/reader/readerui.lua
@@ -648,7 +648,7 @@ function ReaderUI:extendProvider(file, provider, is_provider_forced)
         end
     end
     provider.is_fb2 = file_type:sub(1, 2) == "fb"
-    provider.is_txt = file_type == "txt" or nil
+    provider.is_txt = file_type == "txt"
     return provider
 end