--- a/mobile/android/services/src/main/java/org/mozilla/gecko/fxa/authenticator/AndroidFxAccount.java
+++ b/mobile/android/services/src/main/java/org/mozilla/gecko/fxa/authenticator/AndroidFxAccount.java
@@ -806,17 +806,17 @@ public class AndroidFxAccount {
   }
 
   private long getUserDataLong(String key, long defaultValue) {
     final String numStr = accountManager.getUserData(account, key);
     if (TextUtils.isEmpty(numStr)) {
       return defaultValue;
     }
     try {
-      return Long.parseLong(key);
+      return Long.parseLong(numStr);
     } catch (NumberFormatException e) {
       Logger.warn(LOG_TAG, "Couldn't parse " + key + "; defaulting to " + defaultValue, e);
       return defaultValue;
     }
   }
 
   @Nullable
   public synchronized String getDeviceId() {