diff --git a/cli/lib/compass/sass_compiler.rb b/cli/lib/compass/sass_compiler.rb
index 068471b739..bc0d0dbdf5 100644
--- a/cli/lib/compass/sass_compiler.rb
+++ b/cli/lib/compass/sass_compiler.rb
@@ -133,7 +133,7 @@ def corresponding_css_file(sass_file)
   end
 
   def stylesheet_name(sass_file)
-    if sass_file.index(config.sass_path) == 0
+    if sass_file.gsub('\\', '/').index(config.sass_path.gsub('\\', '/')) == 0
       sass_file[(config.sass_path.length + 1)..-6].sub(/\.css$/,'')
     else
       raise Compass::Error, "Individual stylesheets must be in the sass directory."