diff --git a/src/opm/output/eclipse/Summary.cpp b/src/opm/output/eclipse/Summary.cpp
index 570ac24c9..8841212cc 100644
--- a/src/opm/output/eclipse/Summary.cpp
+++ b/src/opm/output/eclipse/Summary.cpp
@@ -1600,7 +1600,8 @@ static const std::unordered_map< std::string, Opm::UnitSystem::measure> region_u
   {"RGIP"     , Opm::UnitSystem::measure::gas_surface_volume },
   {"RGIPL"    , Opm::UnitSystem::measure::gas_surface_volume },
   {"RGIPG"    , Opm::UnitSystem::measure::gas_surface_volume },
-  {"RWIP"     , Opm::UnitSystem::measure::liquid_surface_volume }
+  {"RWIP"     , Opm::UnitSystem::measure::liquid_surface_volume },
+  {"RRPV"     , Opm::UnitSystem::measure::geometric_volume }
 };
 
 static const std::unordered_map< std::string, Opm::UnitSystem::measure> block_units = {
diff --git a/src/opm/parser/eclipse/Parser/ParserKeyword.cpp b/src/opm/parser/eclipse/Parser/ParserKeyword.cpp
index 5e4303fc0..b933253fb 100644
--- a/src/opm/parser/eclipse/Parser/ParserKeyword.cpp
+++ b/src/opm/parser/eclipse/Parser/ParserKeyword.cpp
@@ -707,9 +707,18 @@ void set_dimensions( ParserItem& item,
         else if( m_deckNames.count( std::string(name) ) )
             return true;
 
-        else if (hasMatchRegex())
-            return std::regex_match( name.begin(), name.end(), m_matchRegex);
+        else if (hasMatchRegex()) {
+            bool match = std::regex_match( name.begin(), name.end(), m_matchRegex);
+            if (match)
+                return true;
+        }
 
+        // Last desperate attempt - go through the deckNames list and
+        // interpret the elements as a regular expression.
+        for (const auto& deck_name : this->m_deckNames) {
+            if (std::regex_match(name.begin(), name.end(), std::regex(deck_name)))
+                return true;
+        }
         return false;
     }
 
diff --git a/src/opm/parser/eclipse/share/keywords/000_Eclipse100/R/REGION_PROBE b/src/opm/parser/eclipse/share/keywords/000_Eclipse100/R/REGION_PROBE
index 2488df51f..a52f990b9 100644
--- a/src/opm/parser/eclipse/share/keywords/000_Eclipse100/R/REGION_PROBE
+++ b/src/opm/parser/eclipse/share/keywords/000_Eclipse100/R/REGION_PROBE
@@ -5,6 +5,8 @@
   ],
   "comment": "Tracer keywords where the 2nd letter is a 'T' should be compounded with the tracer name",
   "deck_names": [
+    "RRPV_[0-9A-Z][0-9A-Z][0-9A-Z]",
+    "ROEW_[0-9A-Z][0-9A-Z][0-9A-Z]",
     "ROSAT",
     "ROIP",
     "ROIPL",
diff --git a/tests/parser/SummaryConfigTests.cpp b/tests/parser/SummaryConfigTests.cpp
index 4bdf4d645..f93d692dc 100644
--- a/tests/parser/SummaryConfigTests.cpp
+++ b/tests/parser/SummaryConfigTests.cpp
@@ -1178,11 +1178,19 @@ RPR__REG
 
 ROPT_REG
 /
+
+RRPV_REG
+/
+
+ROEW_REG
+/
 )";
     const auto& summary_config = createSummary(deck_string);
-    BOOST_CHECK_EQUAL(summary_config.size(), 6U);
+    BOOST_CHECK_EQUAL(summary_config.size(), 12U);
     BOOST_CHECK(summary_config.hasKeyword("RPR__REG"));
     BOOST_CHECK(summary_config.hasKeyword("ROPT_REG"));
+    BOOST_CHECK(summary_config.hasKeyword("RRPV_REG"));
+    BOOST_CHECK(summary_config.hasKeyword("ROEW_REG"));
     BOOST_CHECK(!summary_config.hasKeyword("RPR"));
     BOOST_CHECK(!summary_config.match("BPR*"));
     BOOST_CHECK(summary_config.match("RPR*"));