diff --git a/src/Renderer.js b/src/Renderer.js
index b4a912d5714..85bcbb383e8 100644
--- a/src/Renderer.js
+++ b/src/Renderer.js
@@ -37,12 +37,21 @@ export function Renderer(options) {
     this.process();
   });
 
-  if (!isRendererDefinedOnAdUnit(adUnitCode)) {
-    // we expect to load a renderer url once only so cache the request to load script
-    loadExternalScript(url, moduleCode, this.callback);
-  } else {
-    utils.logWarn(`External Js not loaded by Renderer since renderer url and callback is already defined on adUnit ${adUnitCode}`);
-  }
+  // use a function, not an arrow, in order to be able to pass "arguments" through
+  this.render = function () {
+    if (!isRendererDefinedOnAdUnit(adUnitCode)) {
+      // we expect to load a renderer url once only so cache the request to load script
+      loadExternalScript(url, moduleCode, this.callback);
+    } else {
+      utils.logWarn(`External Js not loaded by Renderer since renderer url and callback is already defined on adUnit ${adUnitCode}`);
+    }
+
+    if (this._render) {
+      this._render.apply(this, arguments) // _render is expected to use push as appropriate
+    } else {
+      utils.logWarn(`No render function was provided, please use .setRender on the renderer`);
+    }
+  }.bind(this) // bind the function to this object to avoid 'this' errors
 }
 
 Renderer.install = function({ url, config, id, callback, loaded, adUnitCode }) {
@@ -54,7 +63,7 @@ Renderer.prototype.getConfig = function() {
 };
 
 Renderer.prototype.setRender = function(fn) {
-  this.render = fn;
+  this._render = fn;
 };
 
 Renderer.prototype.setEventHandlers = function(handlers) {
diff --git a/test/spec/renderer_spec.js b/test/spec/renderer_spec.js
index 2688c6437fe..77d806e4dbc 100644
--- a/test/spec/renderer_spec.js
+++ b/test/spec/renderer_spec.js
@@ -126,10 +126,13 @@ describe('Renderer', function () {
         id: 1,
         adUnitCode: 'video1'
       });
+      testRenderer.setRender(() => {})
+
+      testRenderer.render()
       expect(utilsSpy.callCount).to.equal(1);
     });
 
-    it('should call loadExternalScript() for script not defined on adUnit', function() {
+    it('should call loadExternalScript() for script not defined on adUnit, only when .render() is called', function() {
       $$PREBID_GLOBAL$$.adUnits = [{
         code: 'video1',
         renderer: {
@@ -143,6 +146,9 @@ describe('Renderer', function () {
         id: 1,
         adUnitCode: undefined
       });
+      expect(loadExternalScript.called).to.be.false;
+
+      testRenderer.render()
       expect(loadExternalScript.called).to.be.true;
     });
   });