diff --git a/libs/horizon/src/horizonx/Constants.ts b/libs/horizon/src/horizonx/Constants.ts
index d023d434..0eb3a9a7 100644
--- a/libs/horizon/src/horizonx/Constants.ts
+++ b/libs/horizon/src/horizonx/Constants.ts
@@ -17,4 +17,4 @@
 export const FunctionComponent = 'FunctionComponent';
 export const ClassComponent = 'ClassComponent';
 
-export const OBSERVER_KEY = Symbol('_horizonObserver');
+export const OBSERVER_KEY = '_horizonObserver';