diff --git a/java_console/inifile/src/main/java/com/rusefi/tune/xml/Msq.java b/java_console/inifile/src/main/java/com/rusefi/tune/xml/Msq.java
index cb2940f1d5..efee8a2721 100644
--- a/java_console/inifile/src/main/java/com/rusefi/tune/xml/Msq.java
+++ b/java_console/inifile/src/main/java/com/rusefi/tune/xml/Msq.java
@@ -65,6 +65,8 @@ public class Msq {
     }
 
     public void writeXmlFile(String outputXmlFileName) throws JAXBException, IOException {
+        Objects.requireNonNull(versionInfo, "versionInfo");
+        versionInfo.validate();
         XmlUtil.writeXml(this, Msq.class, outputXmlFileName);
     }
 
diff --git a/java_console/inifile/src/main/java/com/rusefi/tune/xml/VersionInfo.java b/java_console/inifile/src/main/java/com/rusefi/tune/xml/VersionInfo.java
index d8c223e259..e0d710090c 100644
--- a/java_console/inifile/src/main/java/com/rusefi/tune/xml/VersionInfo.java
+++ b/java_console/inifile/src/main/java/com/rusefi/tune/xml/VersionInfo.java
@@ -1,6 +1,7 @@
 package com.rusefi.tune.xml;
 
 import javax.xml.bind.annotation.XmlAttribute;
+import java.util.Objects;
 
 public class VersionInfo {
     private String firmwareInfo;
@@ -40,4 +41,8 @@ public class VersionInfo {
     public void setSignature(String signature) {
         this.signature = signature;
     }
+
+    public void validate() {
+        Objects.requireNonNull(signature, "signature");
+    }
 }