diff --git a/java/dexpreopt_bootjars.go b/java/dexpreopt_bootjars.go
index 116c833..35f6097 100644
--- a/java/dexpreopt_bootjars.go
+++ b/java/dexpreopt_bootjars.go
@@ -816,7 +816,7 @@
 		cmd.FlagWithArg("--instruction-set-features=", global.InstructionSetFeatures[arch])
 	}
 
-	if global.EnableUffdGc {
+	if global.EnableUffdGc && image.target.Os == android.Android {
 		cmd.Flag("--runtime-arg").Flag("-Xgc:CMC")
 	}