diff --git a/src/index.js b/src/index.js
index 14c6a0d6a..b9586402a 100644
--- a/src/index.js
+++ b/src/index.js
@@ -128,10 +128,7 @@ function PubSub(options) {
 
   this.api = {};
   this.auth = googleAuth(this.options);
-  this.projectId =
-    this.options.projectId ||
-    process.env.GCLOUD_PROJECT ||
-    PROJECT_ID_PLACEHOLDER;
+  this.projectId = this.options.projectId || PROJECT_ID_PLACEHOLDER;
 
   if (this.options.promise) {
     this.Promise = this.options.promise;