--- a/mobile/android/components/SessionStore.js
+++ b/mobile/android/components/SessionStore.js
@@ -763,17 +763,17 @@ SessionStore.prototype = {
     let defaultZoom = {}, allowZoom = {}, minZoom = {}, maxZoom ={},
         width = {}, height = {}, autoSize = {};
     aWindow.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(
       Ci.nsIDOMWindowUtils).getViewportInfo(aDisplayWidth, aDisplayHeight,
         defaultZoom, allowZoom, minZoom, maxZoom, width, height, autoSize);
 
     viewportInfo.defaultZoom = defaultZoom.value;
     viewportInfo.allowZoom = allowZoom.value;
-    viewportInfo.minZoom = maxZoom.value;
+    viewportInfo.minZoom = minZoom.value;
     viewportInfo.maxZoom = maxZoom.value;
     viewportInfo.width = width.value;
     viewportInfo.height = height.value;
     viewportInfo.autoSize = autoSize.value;
 
     return viewportInfo;
   },