diff --git a/modules/userId/index.js b/modules/userId/index.js
index 3253be42a76..be9883dae9c 100644
--- a/modules/userId/index.js
+++ b/modules/userId/index.js
@@ -247,7 +247,7 @@ function getStoredValue(storage, key = undefined) {
       }
     }
     // support storing a string or a stringified object
-    if (typeof storedValue === 'string' && storedValue.charAt(0) === '{') {
+    if (typeof storedValue === 'string' && storedValue.trim().charAt(0) === '{') {
       storedValue = JSON.parse(storedValue);
     }
   } catch (e) {