diff --git a/Sharpmake/UniqueList.cs b/Sharpmake/UniqueList.cs
index e6d2b52af..8950278d7 100644
--- a/Sharpmake/UniqueList.cs
+++ b/Sharpmake/UniqueList.cs
@@ -66,7 +66,7 @@ private bool IsSorted
                 }
                 else
                 {
-                    Interlocked.And(ref _modifierBits, ~(Int64)ModifierBits.DirtyBit);
+                    Interlocked.And(ref _modifierBits, ~(Int64)ModifierBits.SortedBit);
                 }
             }
         }