diff --git a/build-system/pr-check.js b/build-system/pr-check.js
index 3f015f5e2577..581e405c254b 100644
--- a/build-system/pr-check.js
+++ b/build-system/pr-check.js
@@ -118,11 +118,7 @@ function determineBuildTargets(filePaths) {
  * @returns {number}
  */
 function main(argv) {
-  if (argv.length <= 2) {
-    console.error(`Usage: ${__filename} TRAVIS_COMMIT_RANGE`);
-    return -1;
-  }
-  const travisCommitRange = argv[2];
+  const travisCommitRange = argv[2] || '';
   const buildTargets = determineBuildTargets(filesInPr(travisCommitRange));
 
   const sortedBuildTargets = [];