diff --git a/mobile/android/base/toolbar/BrowserToolbar.java b/mobile/android/base/toolbar/BrowserToolbar.java
index c7633186cbe..819e3f2215d 100644
--- a/mobile/android/base/toolbar/BrowserToolbar.java
+++ b/mobile/android/base/toolbar/BrowserToolbar.java
@@ -139,6 +139,9 @@ public class BrowserToolbar extends GeckoRelativeLayout
 
     private static final Interpolator sButtonsInterpolator = new AccelerateInterpolator();
 
+    private static final int TABS_CONTRACTED = 1;
+    private static final int TABS_EXPANDED = 2;
+
     private static final int FORWARD_ANIMATION_DURATION = 450;
     private final ForegroundColorSpan mUrlColor;
     private final ForegroundColorSpan mBlockedColor;