diff --git a/src/d6t/d6t.cxx b/src/d6t/d6t.cxx
index 815016bc..5c3dd142 100644
--- a/src/d6t/d6t.cxx
+++ b/src/d6t/d6t.cxx
@@ -191,13 +191,13 @@ D6T_STATUS_T D6T::getTemperature(float &ptat, std::vector<float> &temperatureDat
     return D6T_STATUS_SUCCESS;
 }
 
-D6T_STATUS_T D6T::getTemperatureScale(TemperatureUnit &unit)
+D6T_STATUS_T D6T::getTemperatureScale(upm::TemperatureUnit &unit)
 {
     unit = m_tempScale;
     return D6T_STATUS_SUCCESS;
 }
 
-D6T_STATUS_T D6T::setTemperatureScale(TemperatureUnit unit)
+D6T_STATUS_T D6T::setTemperatureScale(upm::TemperatureUnit unit)
 {
     m_tempScale = unit;
     return D6T_STATUS_SUCCESS;