diff --git a/frontend/document/credocument.lua b/frontend/document/credocument.lua
index 45f1bc44e..4ddfc63d3 100644
--- a/frontend/document/credocument.lua
+++ b/frontend/document/credocument.lua
@@ -428,11 +428,14 @@ end
 
 function CreDocument:register(registry)
     registry:addProvider("txt", "application/txt", self)
+    registry:addProvider("txt.zip", "application/zip", self)
     registry:addProvider("epub", "application/epub", self)
     registry:addProvider("fb2", "application/fb2", self)
     registry:addProvider("fb2.zip", "application/zip", self)
     registry:addProvider("html", "application/html", self)
+    registry:addProvider("html.zip", "application/zip", self)
     registry:addProvider("htm", "application/htm", self)
+    registry:addProvider("htm.zip", "application/zip", self)
     registry:addProvider("rtf", "application/rtf", self)
     registry:addProvider("mobi", "application/mobi", self)
     registry:addProvider("prc", "application/prc", self)