diff --git a/pipelines/build/common/build_base_file.groovy b/pipelines/build/common/build_base_file.groovy
index daae911a3..489fec183 100644
--- a/pipelines/build/common/build_base_file.groovy
+++ b/pipelines/build/common/build_base_file.groovy
@@ -733,7 +733,7 @@ class Builder implements Serializable {
 
         def timestamp = new Date().format('yyyy-MM-dd-HH-mm', TimeZone.getTimeZone('UTC'))
         if (javaToBuild == "jdk${headVersion}") {
-          timestamp = "ea.${scmReference}".replaceAll("jdk-","").replaceAll("_adopt","").replaceAll("/\.\+/","");
+          timestamp = "ea.${scmReference}".replaceAll("jdk-","").replaceAll("_adopt","").replaceAll('/\.\+/','');
         } else {
           timestamp = new Date().format('yyyy-MM-dd-HH-mm', TimeZone.getTimeZone('UTC'))
         }