How to exclude file from synchronizations with svn repo in Subclipse?

I want to exclude a file (.properties) in my project in Eclipse from being checked during synchronization with the svn repo. If I make a change in this .properties file in my Eclipse project, its icon will be marked indicating that the project is not synchronized with the repo. How can I avoid this?

I don't want to exclude this file from the repo, because from time to time I will commit a new version.