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-rw-r--r--Source/Core/AbsyType.cs1
1 files changed, 1 insertions, 0 deletions
diff --git a/Source/Core/AbsyType.cs b/Source/Core/AbsyType.cs
index 944bbe08..fe2b9a4c 100644
--- a/Source/Core/AbsyType.cs
+++ b/Source/Core/AbsyType.cs
@@ -11,6 +11,7 @@ namespace Microsoft.Boogie {
using System;
using System.Collections;
using System.Diagnostics;
+ using System.Linq;
using System.Collections.Generic;
using Microsoft.Boogie.AbstractInterpretation;
using System.Diagnostics.Contracts;