Index: Ringtoets/Piping/src/Ringtoets.Piping.IO/SurfaceLines/PipingSurfaceLinesCsvReader.cs
===================================================================
diff -u -r968645e02cdc2c21c899fa8099589c779138be54 -r9a4c74a9d2cc49987adf0049919baafa6e12a618
--- Ringtoets/Piping/src/Ringtoets.Piping.IO/SurfaceLines/PipingSurfaceLinesCsvReader.cs	(.../PipingSurfaceLinesCsvReader.cs)	(revision 968645e02cdc2c21c899fa8099589c779138be54)
+++ Ringtoets/Piping/src/Ringtoets.Piping.IO/SurfaceLines/PipingSurfaceLinesCsvReader.cs	(.../PipingSurfaceLinesCsvReader.cs)	(revision 9a4c74a9d2cc49987adf0049919baafa6e12a618)
@@ -27,6 +27,7 @@
 using Core.Common.Base.Geometry;
 using Core.Common.IO;
 using Core.Common.IO.Exceptions;
+using Core.Common.IO.Readers;
 using Core.Common.Utils;
 using Core.Common.Utils.Builders;
 using Ringtoets.Piping.Data;