diff --git a/src/index.js b/src/index.js
index e9f7c4f8..1087024f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -57,6 +57,7 @@ const launch = function launch () {
     defineReactiveSetter(this.$apollo, 'client', apollo.$client)
     defineReactiveSetter(this.$apollo, 'loadingKey', apollo.$loadingKey)
     defineReactiveSetter(this.$apollo, 'error', apollo.$error)
+    defineReactiveSetter(this.$apollo, 'watchLoading', apollo.$watchLoading)
   }
 
   if (this._apolloQueries) {