diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java
index 6c3d80dade..ff6a9ffd77 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/action/TbLogNode.java
@@ -92,12 +92,14 @@ public class TbLogNode implements TbNode {
     boolean isStandard(TbLogNodeConfiguration conf) {
         Objects.requireNonNull(conf, "node config is null");
         final TbLogNodeConfiguration defaultConfig = new TbLogNodeConfiguration().defaultConfiguration();
-        switch (conf.getScriptLang()) {
-            case JS: return defaultConfig.getJsScript().equals(conf.getJsScript());
-            case TBEL: return defaultConfig.getTbelScript().equals(conf.getTbelScript());
-            default:
-                log.warn("No rule to define isStandard script for script language [{}], assuming that is non-standard", conf.getScriptLang());
-                return false;
+
+        if (conf.getScriptLang() == null || conf.getScriptLang().equals(ScriptLanguage.JS)) {
+            return defaultConfig.getJsScript().equals(conf.getJsScript());
+        } else if (conf.getScriptLang().equals(ScriptLanguage.TBEL)) {
+            return defaultConfig.getTbelScript().equals(conf.getTbelScript());
+        } else {
+            log.warn("No rule to define isStandard script for script language [{}], assuming that is non-standard", conf.getScriptLang());
+            return false;
         }
     }
 
diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/action/TbLogNodeTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/action/TbLogNodeTest.java
index 21e99af819..f12288da3a 100644
--- a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/action/TbLogNodeTest.java
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/action/TbLogNodeTest.java
@@ -110,6 +110,19 @@ public class TbLogNodeTest {
 
     }
 
+    @Test
+    void backwardCompatibility_whenScriptLangIsNull() throws TbNodeException {
+        TbLogNodeConfiguration config = new TbLogNodeConfiguration().defaultConfiguration();
+        TbLogNode node = spy(new TbLogNode());
+        TbNodeConfiguration tbNodeConfiguration = new TbNodeConfiguration(JacksonUtil.valueToTree(config));
+        TbContext ctx = mock(TbContext.class);
+        node.init(ctx, tbNodeConfiguration);
+
+        assertThat(node.isStandard(config)).as("Script is standard for language JS").isTrue();
+        verify(node, never()).createScriptEngine(any(), any());
+        verify(ctx, never()).createScriptEngine(any(), anyString());
+    }
+
     @Test
     void givenScriptEngineEnum_whenNewAdded_thenFailed() {
         assertThat(ScriptLanguage.values().length).as("only two ScriptLanguage supported").isEqualTo(2);