diff --git a/src/opm/input/eclipse/Schedule/UDQ/UDQSet.cpp b/src/opm/input/eclipse/Schedule/UDQ/UDQSet.cpp
index 058e2d8cd..484b58783 100644
--- a/src/opm/input/eclipse/Schedule/UDQ/UDQSet.cpp
+++ b/src/opm/input/eclipse/Schedule/UDQ/UDQSet.cpp
@@ -519,8 +519,8 @@ std::pair<UDQSet, UDQSet> udq_cast(const UDQSet& lhs, const UDQSet& rhs)
     }
 
     auto msg = fmt::format("Type/size mismatch when combining UDQs {}(size={}, type={}) and {}(size={}, type={})",
-                           lhs.name(), lhs.size(), lhs.var_type(),
-                           rhs.name(), rhs.size(), rhs.var_type());
+                           lhs.name(), lhs.size(), static_cast<int>(lhs.var_type()),
+                           rhs.name(), rhs.size(), static_cast<int>(rhs.var_type()));
     throw std::logic_error(msg);
 }
 
diff --git a/src/opm/output/eclipse/AggregateGroupData.cpp b/src/opm/output/eclipse/AggregateGroupData.cpp
index 799de4c83..e610e61b5 100644
--- a/src/opm/output/eclipse/AggregateGroupData.cpp
+++ b/src/opm/output/eclipse/AggregateGroupData.cpp
@@ -91,7 +91,8 @@ int nwgmax(const std::vector<int>& inteHead)
             return value::GuideRateMode::None;
 
         default:
-            throw std::logic_error(fmt::format("Not recognized value: {} for GuideRateProdTarget", grpt));
+            throw std::logic_error(fmt::format("Not recognized value: {} for GuideRateProdTarget",
+                                               static_cast<int>(grpt)));
     }
 }