diff --git a/src/opm/input/eclipse/EclipseState/Grid/FieldProps.hpp b/src/opm/input/eclipse/EclipseState/Grid/FieldProps.hpp
index 514480ab0..28a825b3e 100644
--- a/src/opm/input/eclipse/EclipseState/Grid/FieldProps.hpp
+++ b/src/opm/input/eclipse/EclipseState/Grid/FieldProps.hpp
@@ -263,7 +263,9 @@ static const std::unordered_map<std::string, keyword_info<double>> double_keywor
                                                                                       {"SALT",     keyword_info<double>{}.unit_string("Salinity")},
                                                                                       {"TEMPI",    keyword_info<double>{}.unit_string("Temperature")},
                                                                                       {"RS",       keyword_info<double>{}.unit_string("GasDissolutionFactor")},
-                                                                                      {"RV",       keyword_info<double>{}.unit_string("OilDissolutionFactor")}};
+                                                                                      {"RV",       keyword_info<double>{}.unit_string("OilDissolutionFactor")},
+                                                                                      {"RVW",      keyword_info<double>{}.unit_string("OilDissolutionFactor")}
+                                                                                      };
 
 }
 
diff --git a/src/opm/input/eclipse/share/keywords/900_OPM/R/RVW b/src/opm/input/eclipse/share/keywords/900_OPM/R/RVW
new file mode 100644
index 000000000..5a6a24397
--- /dev/null
+++ b/src/opm/input/eclipse/share/keywords/900_OPM/R/RVW
@@ -0,0 +1,10 @@
+{
+  "name": "RVW",
+  "sections": [
+    "SOLUTION"
+  ],
+  "data": {
+    "value_type": "DOUBLE",
+    "dimension": "OilDissolutionFactor"
+  }
+}
diff --git a/src/opm/input/eclipse/share/keywords/keyword_list.cmake b/src/opm/input/eclipse/share/keywords/keyword_list.cmake
index 07b948367..ff304d0e3 100644
--- a/src/opm/input/eclipse/share/keywords/keyword_list.cmake
+++ b/src/opm/input/eclipse/share/keywords/keyword_list.cmake
@@ -1112,6 +1112,7 @@ set( keywords
      900_OPM/P/PYACTION
      900_OPM/P/PYINPUT
      900_OPM/R/RHO
+     900_OPM/R/RVW
      900_OPM/R/RWGSALT
      900_OPM/S/SALTP
      900_OPM/S/SALTPVD