diff --git a/lib/compass/commands/watch_project.rb b/lib/compass/commands/watch_project.rb
index 62bd3316..c7b083e9 100644
--- a/lib/compass/commands/watch_project.rb
+++ b/lib/compass/commands/watch_project.rb
@@ -60,6 +60,7 @@ module Compass
 
         FSSM.monitor do |monitor|
           Compass.configuration.sass_load_paths.each do |load_path|
+            next unless load_path.is_a? String
             monitor.path load_path do |path|
               path.glob '**/*.s[ac]ss'