diff --git a/apps/api/src/config/env.validators.ts b/apps/api/src/config/env.validators.ts
index 48b59e78f55..e6f834a2d76 100644
--- a/apps/api/src/config/env.validators.ts
+++ b/apps/api/src/config/env.validators.ts
@@ -56,7 +56,10 @@ export const envValidators = {
   NOVU_INVITE_TEAM_MEMBER_NUDGE_TRIGGER_IDENTIFIER: str({ default: undefined }),
   HUBSPOT_INVITE_NUDGE_EMAIL_USER_LIST_ID: str({ default: undefined }),
   HUBSPOT_PRIVATE_APP_ACCESS_TOKEN: str({ default: undefined }),
-  PLAIN_SUPPORT_KEY: str({ default: undefined }), // Feature Flags
+  ...(processEnv.NOVU_ENTERPRISE === 'true' && {
+    PLAIN_SUPPORT_KEY: str(),
+  }),
+  // Feature Flags
   ...Object.keys(FeatureFlagsKeysEnum).reduce(
     (acc, key) => {
       return {