diff --git a/opm/simulators/flow/MissingFeatures.cpp b/opm/simulators/flow/MissingFeatures.cpp
index dd835107a..813ff4510 100644
--- a/opm/simulators/flow/MissingFeatures.cpp
+++ b/opm/simulators/flow/MissingFeatures.cpp
@@ -81,6 +81,7 @@ namespace MissingFeatures {
         // The list is used to output messages only.
         std::unordered_set<std::string> unsupported_keywords = {
             "ACTION",
+            "ACTIONG",
             "ACTIONX",
             "ADSALNOD",
             "API",