diff --git a/ui/build/ninja.go b/ui/build/ninja.go
index 893fd6d..5961c45 100644
--- a/ui/build/ninja.go
+++ b/ui/build/ninja.go
@@ -145,6 +145,7 @@
 			"RBE_exec_strategy",
 			"RBE_invocation_id",
 			"RBE_log_dir",
+			"RBE_num_retries_if_mismatched",
 			"RBE_platform",
 			"RBE_remote_accept_cache",
 			"RBE_remote_update_cache",