diff --git a/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp b/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp
index ab167229d..e8cdc11f9 100644
--- a/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp
+++ b/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.hpp
@@ -212,6 +212,9 @@ namespace Opm {
                 return runSummaryConfig.create;
             }
 
+            const SummaryConfigNode& operator[](std::size_t index) const;
+
+
         private:
             SummaryConfig( const Deck& deck,
                            const Schedule& schedule,
diff --git a/src/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp b/src/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp
index 7dbc9fde7..f0ea388f9 100644
--- a/src/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp
+++ b/src/opm/parser/eclipse/EclipseState/SummaryConfig/SummaryConfig.cpp
@@ -1327,6 +1327,10 @@ bool SummaryConfig::hasSummaryKey(const std::string& keyword ) const {
     return summary_keywords.find(keyword) != summary_keywords.end();
 }
 
+const SummaryConfigNode& SummaryConfig::operator[](std::size_t index) const {
+    return this->m_keywords[index];
+}
+
 
 bool SummaryConfig::match(const std::string& keywordPattern) const {
     int flags = 0;