diff --git a/src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Debugger/Breakpoint.cs b/src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Debugger/Breakpoint.cs
index 10da6b891c..d400c445e2 100644
--- a/src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Debugger/Breakpoint.cs
+++ b/src/AddIns/Misc/Debugger/Debugger.Core/Project/Src/Debugger/Breakpoint.cs
@@ -7,6 +7,8 @@
 
 using System;
 using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
 using Debugger.Wrappers.CorDebug;
 
 namespace Debugger