diff --git a/src/FactSystem/Fact.cc b/src/FactSystem/Fact.cc
index 9becee8db6465011915301551e6d2fadff67d57f..565fe3b921ac5b8468f490420fa72295d07b25e7 100644
--- a/src/FactSystem/Fact.cc
+++ b/src/FactSystem/Fact.cc
@@ -310,6 +310,9 @@ QString Fact::_variantToString(const QVariant& variant, int decimalPlaces) const
         }
     }
         break;
+    case FactMetaData::valueTypeBool:
+        valueString = variant.toBool() ? tr("true") : tr("false");
+        break;
     case FactMetaData::valueTypeElapsedTimeInSeconds:
     {
         double dValue = variant.toDouble();