diff --git a/java/config/config.go b/java/config/config.go
index 3ca9bad..422f860 100644
--- a/java/config/config.go
+++ b/java/config/config.go
@@ -148,7 +148,7 @@
 	pctx.SourcePathVariable("JavaKytheExtractorJar", "prebuilts/build-tools/common/framework/javac_extractor.jar")
 	pctx.SourcePathVariable("Ziptime", "prebuilts/build-tools/${hostPrebuiltTag}/bin/ziptime")
 
-	pctx.HostBinToolVariable("GenKotlinBuildFileCmd", "gen-kotlin-build-file.py")
+	pctx.HostBinToolVariable("GenKotlinBuildFileCmd", "gen-kotlin-build-file")
 
 	pctx.SourcePathVariable("JarArgsCmd", "build/soong/scripts/jar-args.sh")
 	pctx.SourcePathVariable("PackageCheckCmd", "build/soong/scripts/package-check.sh")