diff --git a/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java b/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java
index 63019c6da1..8d3bae3e09 100644
--- a/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java
+++ b/common/script/script-api/src/main/java/org/thingsboard/script/api/tbel/TbUtils.java
@@ -662,7 +662,7 @@ public class TbUtils {
         for (String strKey : alKeys) {
             encodedMdnOpt = Optional.of(encodedMdnOpt.get().replaceAll(enCodeMdn.get(strKey), strKey));
         }
-        return encodedMdnOpt.orElse(null) == null ? null : URLDecoder.decode(encodedMdnOpt.orElse(null), StandardCharsets.UTF_8);
+        return encodedMdnOpt.orElse(null) == null ? null : URLDecoder.decode(encodedMdnOpt.get(), StandardCharsets.UTF_8);
     }
 
     private static void parseRecursive(Object json, Map<String, Object> map, List<String> excludeList, String path, boolean pathInKey) {