Add note regarding #16

README.md

@@ -56,7 +56,7 @@ The template path (optional, defaults to `css` template provided with plugin).If
 #### options.targetPath
 Type: `String`
 
-The path where the (S)CSS file should be saved, relative to the path used in ```gulp.dest()``` (optional, defaults to ```_icons.css```).
+The path where the (S)CSS file should be saved, relative to the path used in ```gulp.dest()``` (optional, defaults to ```_icons.css```). Depennding on the path, it might be necessary to set the ```base``` option, see https://github.com/backflip/gulp-iconfont-css/issues/16.
 
 #### options.fontPath
 Type: `String`