diff --git a/cc/builder.go b/cc/builder.go
index 81ecd73..7144508 100644
--- a/cc/builder.go
+++ b/cc/builder.go
@@ -229,6 +229,7 @@
 	sAbiFlags   string
 	yasmFlags   string
 	aidlFlags   string
+	rsFlags     string
 	toolchain   config.Toolchain
 	clang       bool
 	tidy        bool