diff --git a/src/Splat.Prism.Forms/PrismApplication.cs b/src/Splat.Prism.Forms/PrismApplication.cs
index 7dacf7f29..e8d674f81 100644
--- a/src/Splat.Prism.Forms/PrismApplication.cs
+++ b/src/Splat.Prism.Forms/PrismApplication.cs
@@ -9,6 +9,8 @@
 using Prism;
 using Prism.Ioc;
 
+[assembly: Xamarin.Forms.XmlnsDefinition("http://prismlibrary.com", "Splat.Prism.Forms")]
+
 namespace Splat.Prism.Forms
 {
     /// <summary>