diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 578f36c..a6da89f 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -1001,6 +1001,7 @@
     }
 
     public void setContentAlpha(float alpha) {
+        alpha = Utilities.boundToRange(alpha, 0, 1);
         mContentAlpha = alpha;
         for (int i = getChildCount() - 1; i >= 0; i--) {
             TaskView child = getPageAt(i);