diff --git a/kotlin-codegen/compiler/src/main/java/com/squareup/moshi/AdapterGenerator.kt b/kotlin-codegen/compiler/src/main/java/com/squareup/moshi/AdapterGenerator.kt
index 4f93169..c49a1c0 100644
--- a/kotlin-codegen/compiler/src/main/java/com/squareup/moshi/AdapterGenerator.kt
+++ b/kotlin-codegen/compiler/src/main/java/com/squareup/moshi/AdapterGenerator.kt
@@ -92,6 +92,7 @@ internal class AdapterGenerator(
     }
 
     val result = FileSpec.builder(className.packageName(), adapterName)
+    result.addComment("Code generated by moshi-kotlin-codegen. Do not edit.")
     if (hasCompanionObject) {
       result.addFunction(generateJsonAdapterFun())
     }