diff --git a/BUILD.gn b/BUILD.gn
index ae8e012920f00fc598b876e824a86299e4272ca8..1160586e0c73ca9ea94cdf458ef24befd5908dda 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -187,7 +187,7 @@ config("ark_toolchain_common_config") {
     defines += [ "NDEBUG" ]
   }
 
-  if (defined(enable_cmc_gc) && enable_cmc_gc) {
+  if (toolchain_enable_cmc_gc) {
     defines += [ "USE_CMC_GC" ]
     defines += [ "USE_READ_BARRIER" ]
   }
diff --git a/toolchain_config.gni b/toolchain_config.gni
index e02bd052a388858f80c789fc5bf48fda87ffb463..6641441e555b4b6f884db08df835538a0d7ac90c 100644
--- a/toolchain_config.gni
+++ b/toolchain_config.gni
@@ -19,6 +19,14 @@ if (target_cpu == "arm64") {
   TARGET = "aarch64"
 }
 
+declare_args() {
+  toolchain_enable_cmc_gc = false
+}
+
+if (defined(enable_cmc_gc) && !toolchain_enable_cmc_gc) {
+  toolchain_enable_cmc_gc = enable_cmc_gc
+}
+
 if (!ark_standalone_build) {
   build_root = "//build"
   ark_third_party_root = "//third_party"