diff --git a/lib/scope.js b/lib/scope.js
index c1c90eba..f6384856 100644
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -246,9 +246,15 @@ function mergeQuery(base, update) {
     }
   }
 
-  // Overwrite inclusion
+  // Merge inclusion
   if (update.include) {
-    base.include = update.include;
+    if (!base.include) {
+      base.include = update.include;
+    } else {
+      var saved = base.include;
+      base.include = {};
+      base.include[update.include] = [saved];
+    }
   }
   if (update.collect) {
     base.collect = update.collect;