diff --git a/background/background.js b/background/background.js
index f76d0424..678c77d0 100644
--- a/background/background.js
+++ b/background/background.js
@@ -323,13 +323,13 @@ function onRuntimeMessage(request, sender, sendResponse) {
         .catch(() => sendResponse(null));
       return KEEP_CHANNEL_OPEN;
 
-    case 'injectResource':
-      injectResource(request, sender.tab.id).then(sendResponse);
+    case 'injectContent':
+      injectContent(request, sender.tab.id).then(sendResponse);
       return KEEP_CHANNEL_OPEN;
   }
 }
 
-function injectResource({resources}, tabId) {
+function injectContent({resources}, tabId) {
   return Promise.all(doInject())
     .then(() => ({status: 'success'}))
     .catch(err => ({status: 'error', error: err.message}));
diff --git a/content/install-user-css.js b/content/install-user-css.js
index 512c8785..ec3aaeb5 100644
--- a/content/install-user-css.js
+++ b/content/install-user-css.js
@@ -231,7 +231,7 @@ function createSourceLoader() {
 
 function initUsercssInstall() {
   pendingResource = communicate({
-    method: 'injectResource',
+    method: 'injectContent',
     resources: [
       '/js/dom.js',
       '/js/localization.js',