diff --git a/.ci/jenkins/Jenkinsfile.deploy b/.ci/jenkins/Jenkinsfile.deploy
index b367bd388..a6e20a773 100644
--- a/.ci/jenkins/Jenkinsfile.deploy
+++ b/.ci/jenkins/Jenkinsfile.deploy
@@ -363,7 +363,7 @@ List getTestFailedImages() {
 ////////////////////////////////////////////////////////////////////////
 
 boolean isDeployImage() {
-    return !env.DISABLE_IMAGES_DEPLOY
+    return !Boolean.valueOf(env.DISABLE_IMAGES_DEPLOY)
 }
 
 boolean isDeployImageInOpenshiftRegistry() {