diff --git a/demo/vpaid/vpaid-client.js b/demo/vpaid/vpaid-client.js
index b721127..d3236f6 100644
--- a/demo/vpaid/vpaid-client.js
+++ b/demo/vpaid/vpaid-client.js
@@ -1619,8 +1619,8 @@ var IntersectionObserver = function (_BaseTechnique) {
     key: 'dispose',
     value: function dispose() {
       if (this.observer) {
-        this.observer.unobserve(element);
-        this.observer.disconnect(element);
+        this.observer.unobserve(this.element);
+        this.observer.disconnect(this.element);
       }
     }
 
diff --git a/dist/openvv.js b/dist/openvv.js
index 3727643..7ad7b28 100644
--- a/dist/openvv.js
+++ b/dist/openvv.js
@@ -1563,8 +1563,8 @@ var IntersectionObserver = function (_BaseTechnique) {
     key: 'dispose',
     value: function dispose() {
       if (this.observer) {
-        this.observer.unobserve(element);
-        this.observer.disconnect(element);
+        this.observer.unobserve(this.element);
+        this.observer.disconnect(this.element);
       }
     }
 
diff --git a/src/Measurement/MeasurementTechniques/IntersectionObserver.js b/src/Measurement/MeasurementTechniques/IntersectionObserver.js
index db87766..4acd5a5 100644
--- a/src/Measurement/MeasurementTechniques/IntersectionObserver.js
+++ b/src/Measurement/MeasurementTechniques/IntersectionObserver.js
@@ -46,8 +46,8 @@ export default class IntersectionObserver extends BaseTechnique {
    */
   dispose() {
     if(this.observer) {
-      this.observer.unobserve(element);
-      this.observer.disconnect(element);
+      this.observer.unobserve(this.element);
+      this.observer.disconnect(this.element);
     }
   }
 
@@ -106,4 +106,4 @@ export default class IntersectionObserver extends BaseTechnique {
     }
   }
 
-}
\ No newline at end of file
+}