diff --git a/opm/parser/eclipse/EclipseState/Schedule/Well.cpp b/opm/parser/eclipse/EclipseState/Schedule/Well.cpp
index 7ed1f8c67..1b6bfac6d 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/Well.cpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/Well.cpp
@@ -53,7 +53,9 @@ namespace Opm {
           m_preferredPhase(preferredPhase),
           m_grid( grid ),
           m_comporder(completionOrdering),
-          m_allowCrossFlow(allowCrossFlow)
+          m_allowCrossFlow(allowCrossFlow),
+          m_is_multi_segment(false),
+          m_segmentset(new DynamicState<SegmentSetPtr>(timeMap, SegmentSetPtr(new SegmentSet())))
     {
         m_name = name_;
         m_creationTimeStep = creationTimeStep;
@@ -350,6 +352,19 @@ namespace Opm {
         return canOpen;
     }
 
+    bool Well::isMultiSegment() const {
+        return m_is_multi_segment;
+    }
+
+    void Well::setMultiSegment(const bool is_multi_segment) {
+        m_is_multi_segment = is_multi_segment;
+    }
+
+    SegmentSetConstPtr Well::getSegmentSet(size_t time_step) const {
+        return m_segmentset->get(time_step);
+    }
+
+
 }
 
 
diff --git a/opm/parser/eclipse/EclipseState/Schedule/Well.hpp b/opm/parser/eclipse/EclipseState/Schedule/Well.hpp
index 669e9aaa7..0af06bb7d 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/Well.hpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/Well.hpp
@@ -25,6 +25,8 @@
 #include <opm/parser/eclipse/EclipseState/Schedule/DynamicState.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/CompletionSet.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/Completion.hpp>
+#include <opm/parser/eclipse/EclipseState/Schedule/SegmentSet.hpp>
+#include <opm/parser/eclipse/EclipseState/Schedule/Segment.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/WellProductionProperties.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/WellInjectionProperties.hpp>
 #include <opm/parser/eclipse/EclipseState/Schedule/WellPolymerProperties.hpp>
@@ -111,6 +113,10 @@ namespace Opm {
         bool canOpen(size_t time_step) const;
 
 
+        // for multi-segment wells
+        bool isMultiSegment() const;
+        void setMultiSegment(const bool is_multi_segment);
+        SegmentSetConstPtr getSegmentSet(size_t time_step) const;
 
 
 
@@ -148,6 +154,10 @@ namespace Opm {
         WellCompletion::CompletionOrderEnum m_comporder;
         bool m_allowCrossFlow;
 
+        // WELSEGS DATA - for mutli-segment wells
+        // flag indicating if the well is a multi-segment well
+        bool m_is_multi_segment;
+        std::shared_ptr<DynamicState<SegmentSetPtr>> m_segmentset;
     };
     typedef std::shared_ptr<Well> WellPtr;
     typedef std::shared_ptr<const Well> WellConstPtr;