--- a/mobile/android/base/gfx/GeckoLayerClient.java
+++ b/mobile/android/base/gfx/GeckoLayerClient.java
@@ -340,17 +340,17 @@ public class GeckoLayerClient
     }
 
     public DisplayPortMetrics getDisplayPort(boolean pageSizeUpdate, boolean isBrowserContentDisplayed, int tabId, ViewportMetrics metrics) {
         Tabs tabs = Tabs.getInstance();
         if (tabs.isSelectedTab(tabs.getTab(tabId)) && isBrowserContentDisplayed) {
             // for foreground tabs, send the viewport update unless the document
             // displayed is different from the content document. In that case, just
             // calculate the display port.
-            return handleViewportMessage(metrics, pageSizeUpdate ? ViewportMessageType.UPDATE : ViewportMessageType.PAGE_SIZE);
+            return handleViewportMessage(metrics, pageSizeUpdate ? ViewportMessageType.PAGE_SIZE : ViewportMessageType.UPDATE);
         } else {
             // for background tabs, request a new display port calculation, so that
             // when we do switch to that tab, we have the correct display port and
             // don't need to draw twice (once to allow the first-paint viewport to
             // get to java, and again once java figures out the display port).
             ImmutableViewportMetrics newMetrics = new ImmutableViewportMetrics(metrics);
             return DisplayPortCalculator.calculate(newMetrics, null);
         }