diff --git a/lib/js/views/search_box.js b/lib/js/views/search_box.js
index 6a95535..596ed00 100644
--- a/lib/js/views/search_box.js
+++ b/lib/js/views/search_box.js
@@ -145,9 +145,7 @@ VS.ui.SearchBox = Backbone.View.extend({
   // since its position is unknown by the time the collection triggers this
   // remove callback.
   removedFacet : function (facet, query, options) {
-    if (this.app.options.callbacks.removedFacet) {
-      this.app.options.callbacks.removedFacet(facet, query, options);
-    }
+    this.app.options.callbacks.removedFacet(facet, query, options);
   },
 
   // Renders each facet as a searchFacet view.
@@ -222,7 +220,7 @@ VS.ui.SearchBox = Backbone.View.extend({
       this.focusSearch(e);
     }, this);
 
-    if (this.app.options.callbacks.clearSearch) {
+    if (this.app.options.callbacks.clearSearch != $.noop) {
       this.app.options.callbacks.clearSearch(actualClearSearch);
     } else {
       actualClearSearch();
diff --git a/lib/js/views/search_input.js b/lib/js/views/search_input.js
index a9e0d66..0c09ccc 100644
--- a/lib/js/views/search_input.js
+++ b/lib/js/views/search_input.js
@@ -320,11 +320,9 @@ VS.ui.SearchInput = Backbone.View.extend({
       this.box.trigger('resize.autogrow', e);
       var query    = this.box.val();
       var prefixes = [];
-      if (this.app.options.callbacks.facetMatches) {
-          this.app.options.callbacks.facetMatches(function(p) {
-              prefixes = p;
-          });
-      }
+      this.app.options.callbacks.facetMatches(function(p) {
+          prefixes = p;
+      });
       var labels   = _.map(prefixes, function(prefix) {
         if (prefix.label) return prefix.label;
         else              return prefix;