diff --git a/Jenkinsfile b/Jenkinsfile
index a416d6643..3fc24c404 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -174,7 +174,7 @@ node("${params.BUILD_ON_NODE}") {
       returnStdout: true,
       script: """
               @echo off
-              if defined c (echo 1) else (echo 0)
+              if defined CTXSIGN (echo 1) else (echo 0)
               """
     ).trim()