Index: Ringtoets/Piping/src/Ringtoets.Piping.IO/SurfaceLines/CharacteristicPointsCsvReader.cs
===================================================================
diff -u -r16bd8076863c03907abeee60b16704aba1bdb1a0 -r1b9445050ddc7786014349d7014c7c4d85242a5d
--- Ringtoets/Piping/src/Ringtoets.Piping.IO/SurfaceLines/CharacteristicPointsCsvReader.cs	(.../CharacteristicPointsCsvReader.cs)	(revision 16bd8076863c03907abeee60b16704aba1bdb1a0)
+++ Ringtoets/Piping/src/Ringtoets.Piping.IO/SurfaceLines/CharacteristicPointsCsvReader.cs	(.../CharacteristicPointsCsvReader.cs)	(revision 1b9445050ddc7786014349d7014c7c4d85242a5d)
@@ -25,6 +25,7 @@
 using System.IO;
 using System.Linq;
 using Core.Common.Base.Geometry;
+using Core.Common.Base.IO;
 using Core.Common.IO.Exceptions;
 using Core.Common.IO.Readers;
 using Core.Common.Utils;