diff --git a/opm/input/eclipse/EclipseState/Grid/LgrCollection.hpp b/opm/input/eclipse/EclipseState/Grid/LgrCollection.hpp
index f8a8fd0c0..4de5ab97e 100644
--- a/opm/input/eclipse/EclipseState/Grid/LgrCollection.hpp
+++ b/opm/input/eclipse/EclipseState/Grid/LgrCollection.hpp
@@ -43,6 +43,8 @@ public:
     Carfin& getLgr(const std::string& lgrName);
     const Carfin& getLgr(const std::string& lgrName) const;
 
+    void addLgr(const std::string& lgrName);
+
     template<class Serializer>
     void serializeOp(Serializer& serializer)
     {
diff --git a/src/opm/input/eclipse/EclipseState/Grid/LgrCollection.cpp b/src/opm/input/eclipse/EclipseState/Grid/LgrCollection.cpp
index 26aed247b..168ca6885 100644
--- a/src/opm/input/eclipse/EclipseState/Grid/LgrCollection.cpp
+++ b/src/opm/input/eclipse/EclipseState/Grid/LgrCollection.cpp
@@ -68,4 +68,10 @@ namespace Opm {
         return m_lgrs.get( lgrName );
     }
 
+    void LgrCollection::addLgr(const std::string& lgrName) {
+        Carfin lgr(lgrName);
+        m_lgrs.insert(std::make_pair(lgr.NAME(), lgr)); 
+    }
+    
+
 }
diff --git a/tests/parser/LgrTests.cpp b/tests/parser/LgrTests.cpp
index b269fd071..8f1b7ee4b 100644
--- a/tests/parser/LgrTests.cpp
+++ b/tests/parser/LgrTests.cpp
@@ -25,3 +25,22 @@ BOOST_AUTO_TEST_CASE(CreateLgrCollection) {
     BOOST_CHECK(! lgrs.hasLgr("NO-NotThisOne"));
     BOOST_CHECK_THROW( lgrs.getLgr("NO") , std::invalid_argument );
 }
+
+BOOST_AUTO_TEST_CASE(AddLgrsToCollection) {
+    Opm::LgrCollection lgrs;
+
+    lgrs.addLgr("LGR1");
+    BOOST_CHECK_EQUAL( lgrs.size() , 1U );
+    BOOST_CHECK(lgrs.hasLGR("LGR1"));
+
+    const auto& lgr1 = lgrs.getLgr("LGR1");
+    const auto& lgr12 = lgrs.getLgr(0);
+    BOOST_CHECK_EQUAL(lgr1.getName(), lgr12.getName());
+    BOOST_CHECK_EQUAL(lgr1.getName(), "LGR1");
+
+    lgrs.addLgr("LGR2");
+    const auto& lgr2 = lgrs.getFault("LGR2");
+    BOOST_CHECK_EQUAL( lgrs.size() , 2U );
+    BOOST_CHECK(lgrs.hasLgr("LGR2"));
+    BOOST_CHECK_EQUAL( lgr2.getName() , lgrs.getLgr(1).getName());
+}
\ No newline at end of file