diff --git a/src/RMGConvertLH5.cc b/src/RMGConvertLH5.cc
index fad55a0..61dcf89 100644
--- a/src/RMGConvertLH5.cc
+++ b/src/RMGConvertLH5.cc
@@ -152,7 +152,7 @@ bool RMGConvertLH5::ConvertNTupleToTable(H5::Group& det_group) {
       std::replace(lgdo_units.begin(), lgdo_units.end(), '\\', '/');
     }
 
-    LH5Log(RMGLog::detail, ntuple_log_prefix, "column", lgdo_name, ", with units ", lgdo_units);
+    LH5Log(RMGLog::detail, ntuple_log_prefix, "column ", lgdo_name, ", with units ", lgdo_units);
 
     // remove the column group with its child dataset, while preserving the data itself.
     std::string column_tmp = column + "__tmp";
diff --git a/src/RMGVertexConfinement.cc b/src/RMGVertexConfinement.cc
index 072453c..b541037 100644
--- a/src/RMGVertexConfinement.cc
+++ b/src/RMGVertexConfinement.cc
@@ -348,7 +348,8 @@ void RMGVertexConfinement::InitializePhysicalVolumes() {
   // invalidates old iterators).
   for (const auto& s : new_obj_from_inspection) { fPhysicalVolumes.emplace_back(s); }
 
-  RMGLog::Out(RMGLog::detail, "Sampling from ", fPhysicalVolumes.size(), " physical volumes");
+  RMGLog::OutFormat(RMGLog::detail, "Sampling from {} physical volumes, volume = {}",
+      fPhysicalVolumes.size(), std::string(G4BestUnit(fPhysicalVolumes.total_volume, "Volume")));
 }
 
 void RMGVertexConfinement::InitializeGeometricalVolumes() {