Broken quoting for desktop files

[Desktop Entry]
Type=Application
Name=umo NXM/MOMW Scheme Handler
Exec=/home/user/Morrowind Install/momw-tools-pack-linux/umo %u
StartupNotify=false
Icon=umo
Terminal=false
NoDisplay=true
MimeType=x-scheme-handler/nxm;x-scheme-handler/momw;

The Exec line is wrong there and needs quoting.