diff --git a/spec/vast_tracker.spec.js b/spec/vast_tracker.spec.js
index 71b3bdc3..eadf50a0 100644
--- a/spec/vast_tracker.spec.js
+++ b/spec/vast_tracker.spec.js
@@ -61,6 +61,17 @@ describe('VASTTracker', function () {
         );
       });
 
+      it('should set default ADTYPE macro to video when adType is not set', () => {
+        const adWithoutType = { ...ad, adType: null };
+        vastTracker = new VASTTracker(vastClient, adWithoutType, ad.creatives[0]);
+        vastTracker.trackURLs([{ id: 'valid-url', url: 'http://example.com' }]);
+        expect(spyTrackUtil).toHaveBeenCalledWith(
+          ['http://example.com'],
+          expect.objectContaining({ ADTYPE: 'video' }),
+          expect.any(Object)
+        );
+      });
+
       it('should call track with the expected macros if progress is defined', () => {
         vastTracker.progress = 12;
         vastTracker.trackURLs([{ id: 'valid-url', url: 'http://example.com' }]);
diff --git a/src/vast_tracker.js b/src/vast_tracker.js
index 400805cc..6f977821 100644
--- a/src/vast_tracker.js
+++ b/src/vast_tracker.js
@@ -921,22 +921,20 @@ export class VASTTracker extends EventEmitter {
       if (this.ad.sequence) {
         givenMacros['PODSEQUENCE'] = this.ad.sequence;
       }
-      if (this.ad.adType) {
-        givenMacros['ADTYPE'] = this.ad.adType;
-      }
       if (this.ad.adServingId) {
         givenMacros['ADSERVINGID'] = this.ad.adServingId;
       }
       if (this.ad.categories && this.ad.categories.length) {
         givenMacros['ADCATEGORIES'] = this.ad.categories
-          .map((category) => category.value)
-          .join(',');
+        .map((category) => category.value)
+        .join(',');
       }
       if (this.ad.blockedAdCategories && this.ad.blockedAdCategories.length) {
         givenMacros['BLOCKEDADCATEGORIES'] = this.ad.blockedAdCategories
-          .map((blockedCategorie) => blockedCategorie.value)
-          .join(',');
+        .map((blockedCategorie) => blockedCategorie.value)
+        .join(',');
       }
+      givenMacros['ADTYPE'] = this.ad.adType || 'video';
     }
 
     util.track(validUrls, givenMacros, options);