diff --git a/pkgs/applications/misc/mupdf/default.nix b/pkgs/applications/misc/mupdf/default.nix
index a3067bc4af8..34ada062c71 100644
--- a/pkgs/applications/misc/mupdf/default.nix
+++ b/pkgs/applications/misc/mupdf/default.nix
@@ -74,6 +74,7 @@ in stdenv.mkDerivation rec {
     Comment=PDF viewer
     Exec=$bin/bin/mupdf-x11 %f
     Terminal=false
+    MimeType=application/pdf;application/x-pdf;application/x-cbz;application/oxps;application/vnd.ms-xpsdocument;application/epub+zip
     EOF
   '';