diff --git a/ThirdParty/custom-opm-common/opm-common/opm/io/eclipse/SummaryNode.hpp b/ThirdParty/custom-opm-common/opm-common/opm/io/eclipse/SummaryNode.hpp
index 4690dadea7..16db4fa34a 100644
--- a/ThirdParty/custom-opm-common/opm-common/opm/io/eclipse/SummaryNode.hpp
+++ b/ThirdParty/custom-opm-common/opm-common/opm/io/eclipse/SummaryNode.hpp
@@ -57,6 +57,7 @@ struct SummaryNode {
     Type        type;
     std::string wgname;
     int         number;
+    size_t      smspecKeywordIndex;
 
     std::optional<std::string> fip_region;
 
diff --git a/ThirdParty/custom-opm-common/opm-common/src/opm/io/eclipse/ESmry.cpp b/ThirdParty/custom-opm-common/opm-common/src/opm/io/eclipse/ESmry.cpp
index 6e41d687f9..6f23f481fd 100644
--- a/ThirdParty/custom-opm-common/opm-common/src/opm/io/eclipse/ESmry.cpp
+++ b/ThirdParty/custom-opm-common/opm-common/src/opm/io/eclipse/ESmry.cpp
@@ -193,6 +193,7 @@ ESmry::ESmry(const std::string &filename, bool loadBaseRunData , bool uselodsmry
                     SummaryNode::Type::Undefined,
                     wgnames[i],
                     nums[i],
+                    i,
                     ""
                 });
 
@@ -263,6 +264,7 @@ ESmry::ESmry(const std::string &filename, bool loadBaseRunData , bool uselodsmry
                     SummaryNode::Type::Undefined,
                     wgnames[i],
                     nums[i],
+                    i,
                     ""
                 });