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-rw-r--r--Source/Core/LoopUnroll.cs1
1 files changed, 1 insertions, 0 deletions
diff --git a/Source/Core/LoopUnroll.cs b/Source/Core/LoopUnroll.cs
index 3b61ad3e..580cbdc5 100644
--- a/Source/Core/LoopUnroll.cs
+++ b/Source/Core/LoopUnroll.cs
@@ -6,6 +6,7 @@
using System.Diagnostics.Contracts;
using System.Collections.Generic;
using Bpl = Microsoft.Boogie;
+using Microsoft.Boogie.GraphUtil;
namespace Microsoft.Boogie {
public class LoopUnroll {