diff --git a/frontend/document/credocument.lua b/frontend/document/credocument.lua
index 164f2a7be..5c60ca67f 100644
--- a/frontend/document/credocument.lua
+++ b/frontend/document/credocument.lua
@@ -1510,6 +1510,7 @@ function CreDocument:register(registry)
     registry:addProvider("doc", "application/msword", self, 90)
     registry:addProvider("docx", "application/vnd.openxmlformats-officedocument.wordprocessingml.document", self, 90)
     registry:addProvider("epub", "application/epub+zip", self, 100)
+    registry:addProvider("epub", "application/epub", self, 100) -- Alternative mimetype for OPDS.
     registry:addProvider("epub3", "application/epub+zip", self, 100)
     registry:addProvider("fb2", "application/fb2", self, 90)
     registry:addProvider("fb2", "text/fb2+xml", self, 90) -- Alternative mimetype for OPDS.