diff --git a/docs/source/_assets/js/nav.js b/docs/source/_assets/js/nav.js
index 0f58a238b..bfb5a4617 100644
--- a/docs/source/_assets/js/nav.js
+++ b/docs/source/_assets/js/nav.js
@@ -52,8 +52,10 @@ $.when($.ready).then(function() {
       }, '', href)
 
       // Track on Google Analytics
-      ga('set', 'page', href)
-      ga('send', 'pageview')
+      if (typeof(ga) === 'function') {
+        ga('set', 'page', href)
+        ga('send', 'pageview')
+      }
     })
   })
 
@@ -66,8 +68,10 @@ $.when($.ready).then(function() {
       $('#content').html(e.state.content)
 
       // Track on Google Analytics
-      ga('set', 'page', e.state.href)
-      ga('send', 'pageview')
+      if (typeof(ga) === 'function') {
+        ga('set', 'page', e.state.href)
+        ga('send', 'pageview')
+      }
     }
   }