diff --git a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.js b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.js
index 2dd4c915e1..f91c8ef03d 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.js
+++ b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor.js
@@ -86,6 +86,7 @@
     },
 
     detached: function() {
+      this.cancel();
       this.unlisten(window, 'scroll', '_handleWindowScroll');
     },
 
diff --git a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.html b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.html
index 4f8c532e80..c89d9b52da 100644
--- a/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.html
+++ b/polygerrit-ui/app/elements/diff/gr-diff-processor/gr-diff-processor_test.html
@@ -591,5 +591,12 @@ limitations under the License.
         });
       });
     });
+
+    test('detaching cancels', function() {
+      element = fixture('basic');
+      sandbox.stub(element, 'cancel');
+      element.detached();
+      assert(element.cancel.called);
+    });
   });
 </script>