diff --git a/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java b/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java
index 692ba1ece9..1bcf5190f0 100644
--- a/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java
+++ b/java_console/io/src/main/java/com/rusefi/autodetect/SerialAutoChecker.java
@@ -78,7 +78,7 @@ public class SerialAutoChecker {
         }
     }
 
-    @NotNull
+    @Nullable
     private IoStream getStreamByMode(PortDetector.DetectorMode mode) {
         if (mode == PortDetector.DetectorMode.DETECT_ELM327) {
             return SerialIoStream.openPort(serialPort);