diff --git a/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp b/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp
index a1604f5b7c..3765fab7f4 100644
--- a/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp
+++ b/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.cpp
@@ -849,17 +849,17 @@ RicMswExportInfo RicWellPathExportMswCompletionsImpl::generateFishbonesMswExport
         for ( auto& sub : subs->installedLateralIndices() )
         {
             double subEndMD  = subs->measuredDepth( sub.subIndex );
-            double subEndTVD = -wellPath->wellPathGeometry()->interpolatedPointAlongWellPath( subEndMD ).z();
+            double subEndTVD = RicWellPathExportMswCompletionsImpl::tvdFromMeasuredDepth( wellPath, subEndMD );
             int    subSegCount =
                 SubSegmentIntersectionInfo::numberOfSplittedSegments( subStartMD, subEndMD, maxSegmentLength );
             double subSegLen = ( subEndMD - subStartMD ) / subSegCount;
 
             double startMd  = subStartMD;
-            double startTvd = -wellPath->wellPathGeometry()->interpolatedPointAlongWellPath( startMd ).z();
+            double startTvd = RicWellPathExportMswCompletionsImpl::tvdFromMeasuredDepth( wellPath, startMd );
             for ( int ssi = 0; ssi < subSegCount; ssi++ )
             {
                 double endMd  = startMd + subSegLen;
-                double endTvd = -wellPath->wellPathGeometry()->interpolatedPointAlongWellPath( endMd ).z();
+                double endTvd = RicWellPathExportMswCompletionsImpl::tvdFromMeasuredDepth( wellPath, endMd );
 
                 std::shared_ptr<RicMswSegment> location(
                     new RicMswSegment( subs->generatedName(), startMd, endMd, startTvd, endTvd, sub.subIndex ) );
@@ -1910,6 +1910,18 @@ void RicWellPathExportMswCompletionsImpl::assignBranchAndSegmentNumbers( const R
     }
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+double RicWellPathExportMswCompletionsImpl::tvdFromMeasuredDepth( const RimWellPath* wellPath, double measuredDepth )
+{
+    CVF_ASSERT( wellPath && wellPath->wellPathGeometry() );
+
+    double tvdValue = -wellPath->wellPathGeometry()->interpolatedPointAlongWellPath( measuredDepth ).z();
+
+    return tvdValue;
+}
+
 SubSegmentIntersectionInfo::SubSegmentIntersectionInfo( size_t     globCellIndex,
                                                         double     startTVD,
                                                         double     endTVD,
diff --git a/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.h b/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.h
index ad343b1f44..f2e7211022 100644
--- a/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.h
+++ b/ApplicationCode/Commands/CompletionExportCommands/RicWellPathExportMswCompletionsImpl.h
@@ -163,4 +163,6 @@ private:
                                                int*                           branchNum,
                                                int*                           segmentNum );
     static void assignBranchAndSegmentNumbers( const RimEclipseCase* caseToApply, RicMswExportInfo* exportInfo );
+
+    static double tvdFromMeasuredDepth( const RimWellPath* wellPath, double measuredDepth );
 };