How to escape spaces in .desktop files Exec line

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http://askubuntu.com – I want to make a .desktop file like described here. [Desktop Entry] Name=Sublime Text 2 GenericName=Sublime Text 2 Comment=Edit text files Exec=/home/user/opt/sublime/Sublime Text 2/sublime_text %U However, running that from Nautilus's context menu using Open with this gives me Could not find '/home/user/opt/sublime/Sublime' So I tried Exec="/home/user/opt/sublime/Sublime Text 2/sublime_text" %U and got Text ended before matching quote was found for ". (The text was '"/home/user/opt/sublime/Sublime') What is the correct way to escape spaces in the Exec line of .desktop files? (HowTos)