diff --git a/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigField.java b/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigField.java
index bf2102cb0d..b07125987a 100644
--- a/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigField.java
+++ b/java_tools/configuration_definition/src/main/java/com/rusefi/ConfigField.java
@@ -263,7 +263,7 @@ public class ConfigField {
             scale = scale.substring(1, scale.length() - 1);
             String[] parts = scale.split("/");
             if (parts.length != 2)
-                throw new IllegalArgumentException("Two parts of division expected in " + scale);
+                throw new IllegalArgumentException(name + ": Two parts of division expected in " + scale);
             factor = Double.parseDouble(parts[0]) / Double.parseDouble(parts[1]);
         } else {
             factor = Double.parseDouble(scale);