diff --git a/src/driver_istaheat.cc b/src/driver_istaheat.cc
index bb591f5..252c5a7 100644
--- a/src/driver_istaheat.cc
+++ b/src/driver_istaheat.cc
@@ -68,7 +68,7 @@ namespace
                     {
                         {
                             "ERROR_FLAGS",
-                            Translate::Type::BitToString,
+                            Translate::MapType::BitToString,
                             AlwaysTrigger, MaskBits(0xffff),
                             "OK",
                             {
@@ -82,7 +82,7 @@ namespace
             "The total heat energy consumption recorded by this meter.",
             DEFAULT_PRINT_PROPERTIES,
             Quantity::Energy,
-            VifScaling::Auto,
+            VifScaling::Auto, DifSignedness::Signed,
             FieldMatcher::build()
             .set(MeasurementType::Instantaneous)
             .set(VIFRange::AnyEnergyVIF)
@@ -93,7 +93,7 @@ namespace
             "The total heating media volume recorded by this meter at the end of last month.",
             DEFAULT_PRINT_PROPERTIES,
             Quantity::Volume,
-            VifScaling::Auto,
+            VifScaling::Auto, DifSignedness::Signed,
             FieldMatcher::build()
             .set(MeasurementType::Instantaneous)
             .set(VIFRange::Volume)
@@ -105,7 +105,7 @@ namespace
             "The total heat energy for the previous month period.",
             DEFAULT_PRINT_PROPERTIES,
             Quantity::Energy,
-            VifScaling::Auto,
+            VifScaling::Auto, DifSignedness::Signed,
             FieldMatcher::build()
             .set(MeasurementType::Instantaneous)
             .set(VIFRange::AnyEnergyVIF)
@@ -127,7 +127,7 @@ namespace
             "The total heat energy for the previous year period.",
             DEFAULT_PRINT_PROPERTIES,
             Quantity::Energy,
-            VifScaling::Auto,
+            VifScaling::Auto, DifSignedness::Signed,
             FieldMatcher::build()
             .set(MeasurementType::Instantaneous)
             .set(VIFRange::AnyEnergyVIF)