diff --git a/cmd/soong_build/main.go b/cmd/soong_build/main.go
index 6642023..cd4e9bd 100644
--- a/cmd/soong_build/main.go
+++ b/cmd/soong_build/main.go
@@ -64,6 +64,7 @@
 	flag.StringVar(&usedEnvFile, "used_env", "", "File containing used environment variables")
 	flag.StringVar(&cmdlineArgs.OutDir, "out", "", "the ninja builddir directory")
 	flag.StringVar(&cmdlineArgs.ModuleListFile, "l", "", "file that lists filepaths to parse")
+	flag.StringVar(&cmdlineArgs.KatiSuffix, "kati_suffix", "", "the suffix for kati and ninja files, so that different configurations don't clobber each other")
 
 	// Debug flags
 	flag.StringVar(&delveListen, "delve_listen", "", "Delve port to listen on for debugging")