diff --git a/common/changes/jostrick-fix-viewport_2017-04-28-20-56.json b/common/changes/jostrick-fix-viewport_2017-04-28-20-56.json
new file mode 100644
index 0000000000000..76c80ab8f3098
--- /dev/null
+++ b/common/changes/jostrick-fix-viewport_2017-04-28-20-56.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@uifabric/utilities",
+      "comment": "withViewport: Preserving the `forceUpdate` parameter when asynchronously re-resolving the viewport size.",
+      "type": "patch"
+    }
+  ],
+  "email": "jostrick@microsoft.com"
+}
diff --git a/packages/office-ui-fabric-react/src/utilities/decorators/withViewport.tsx b/packages/office-ui-fabric-react/src/utilities/decorators/withViewport.tsx
index 749de86acfc92..fb3a4ba280edb 100644
--- a/packages/office-ui-fabric-react/src/utilities/decorators/withViewport.tsx
+++ b/packages/office-ui-fabric-react/src/utilities/decorators/withViewport.tsx
@@ -99,7 +99,7 @@ export function withViewport<P extends { viewport?: IViewport }, S>(ComposedComp
             width: clientRect.width,
             height: scrollRect.height
           }
-        }, this._updateViewport);
+        }, () => { this._updateViewport(withForceUpdate); });
       } else {
         this._resizeAttempts = 0;
         updateComponent();