diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Data/PriorityBinding.cs b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Data/PriorityBinding.cs
index 43dba6e825e..11bf1dfa3eb 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Data/PriorityBinding.cs
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Data/PriorityBinding.cs
@@ -113,7 +113,7 @@ internal override void InitializeClone(BindingBase baseClone, BindingMode mode)
     {
         PriorityBinding clone = (PriorityBinding)baseClone;
 
-        for (int i=0; i<=_bindingCollection.Count; ++i)
+        for (int i=0; i<_bindingCollection.Count; ++i)
         {
             clone._bindingCollection.Add(_bindingCollection[i].Clone(mode));
         }