diff --git a/app/models/javascript_cache.rb b/app/models/javascript_cache.rb
index b5dca967ea2..85a31c94c4e 100644
--- a/app/models/javascript_cache.rb
+++ b/app/models/javascript_cache.rb
@@ -12,7 +12,7 @@ class JavascriptCache < ActiveRecord::Base
   end
 
   def local_url
-    "#{Discourse.base_path}/#{path}"
+    "#{Discourse.base_path}#{path}"
   end
 
   private
diff --git a/spec/models/theme_field_spec.rb b/spec/models/theme_field_spec.rb
index 9c26ac49315..8b99f55ef2c 100644
--- a/spec/models/theme_field_spec.rb
+++ b/spec/models/theme_field_spec.rb
@@ -504,6 +504,7 @@ HTML
 
         expect(val["theme_uploads"]["test_js"]).to eq(js_field.upload.url)
         expect(val["theme_uploads_local"]["test_js"]).to eq(js_field.javascript_cache.local_url)
+        expect(val["theme_uploads_local"]["test_js"]).to start_with("/theme-javascripts/")
 
       end