diff --git a/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.hpp b/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.hpp
index 2a340d4d5..42cd7873d 100644
--- a/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.hpp
+++ b/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.hpp
@@ -83,6 +83,7 @@ public:
     std::vector<UDQScalar>::const_iterator begin() const;
     std::vector<UDQScalar>::const_iterator end() const;
 
+    std::vector<std::string> wgnames() const;
     std::vector<double> defined_values() const;
     std::size_t defined_size() const;
     const std::string& name() const;
@@ -93,7 +94,7 @@ private:
 
 
     std::string m_name;
-    UDQVarType m_var_type;
+    UDQVarType m_var_type = UDQVarType::NONE;
     std::unordered_map<std::string, std::size_t> wgname_index;
     std::vector<UDQScalar> values;
 };
diff --git a/src/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.cpp b/src/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.cpp
index dcf7d1551..e4d6d6f34 100644
--- a/src/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.cpp
+++ b/src/opm/parser/eclipse/EclipseState/Schedule/UDQ/UDQSet.cpp
@@ -207,6 +207,12 @@ UDQVarType UDQSet::var_type() const {
     return this->m_var_type;
 }
 
+std::vector<std::string> UDQSet::wgnames() const {
+    std::vector<std::string> names;
+    for (const auto& index_pair : this->wgname_index)
+        names.push_back(index_pair.first);
+    return names;
+}
 
 /************************************************************************/