diff --git a/java_tools/enum_to_string/src/test/java/com/rusefi/EnumToStringTest.java b/java_tools/enum_to_string/src/test/java/com/rusefi/EnumToStringTest.java
index b54fe4dbc8..86d1211f35 100644
--- a/java_tools/enum_to_string/src/test/java/com/rusefi/EnumToStringTest.java
+++ b/java_tools/enum_to_string/src/test/java/com/rusefi/EnumToStringTest.java
@@ -227,4 +227,34 @@ public class EnumToStringTest {
                     "}\n", java);
         }
     }
+
+
+    @Test
+    public void parseCommentedOutEnumWithoutExplicitValues() throws IOException {
+        final StringReader reader = new StringReader(
+                "typedef enum {\n" +
+                        "\t//GPIO_UNASSIGNED,\n" +
+                        "\tGPIO_INVALID,\n" +
+                        "\tGPIO_HEX,\n" +
+                        "}brain_pin_e; // hello");
+        EnumsReader enumsReader = new EnumsReader().read(reader);
+
+        VariableRegistry registry = new VariableRegistry();
+
+        for (Map.Entry<String /*enum name*/, EnumsReader.EnumState> e : enumsReader.getEnums().entrySet()) {
+
+            String a = ToJavaEnum.generate(registry, e.getKey(), e.getValue());
+
+            assertEquals("package com.rusefi.enums;\n" +
+                    "//auto-generated by ToJavaEnum.java\n" +
+                    "\n" +
+                    "\n" +
+                    "\n" +
+                    "public enum brain_pin_e {\n" +
+                    "\tGPIO_INVALID,\n" +
+                    "\tGPIO_HEX,\n" +
+                    "}\n", a);
+        }
+    }
+
 }