diff --git a/toolchain_config.gni b/toolchain_config.gni
index 60d1354ea46812f6576ecdabae346e2a095647c9..ca514acd2e635d9d570d07ecbdbafd53bc65a3dc 100644
--- a/toolchain_config.gni
+++ b/toolchain_config.gni
@@ -20,7 +20,7 @@ if (target_cpu == "arm64") {
 }
 
 declare_args() {
-  toolchain_enable_cmc_gc = false
+  toolchain_enable_cmc_gc = true
 }
 
 if (defined(enable_cmc_gc) && !toolchain_enable_cmc_gc) {