diff --git a/lib/workers/repository/validate.js b/lib/workers/repository/validate.js
index 62c44ab7bd421595cb91c3afe55a7b8232a7314d..0b2d7dbf8bb45e1e0fac657af1cf9a333f808cad 100644
--- a/lib/workers/repository/validate.js
+++ b/lib/workers/repository/validate.js
@@ -20,7 +20,7 @@ async function getRenovateFiles(prNo) {
 }
 
 async function validatePrs(config) {
-  const renovatePrs = await getRenovatePrs(config.branchName);
+  const renovatePrs = await getRenovatePrs(config.branchPrefix);
   let validations = [];
   for (const pr of renovatePrs) {
     try {