diff --git a/packages/@ember/canary-features/index.ts b/packages/@ember/canary-features/index.ts
index 9a7e9baa089..22ac7bdf8f2 100644
--- a/packages/@ember/canary-features/index.ts
+++ b/packages/@ember/canary-features/index.ts
@@ -12,7 +12,7 @@ export const DEFAULT_FEATURES = {
   EMBER_ROUTING_ROUTER_SERVICE: true,
   EMBER_ENGINES_MOUNT_PARAMS: true,
   EMBER_MODULE_UNIFICATION: null,
-  GLIMMER_CUSTOM_COMPONENT_MANAGER: null,
+  GLIMMER_CUSTOM_COMPONENT_MANAGER: true,
   EMBER_TEMPLATE_BLOCK_LET_HELPER: true,
   EMBER_METAL_TRACKED_PROPERTIES: null,
   EMBER_GLIMMER_ANGLE_BRACKET_INVOCATION: true,