diff --git a/Modelica/Media/Incompressible.mo b/Modelica/Media/Incompressible.mo
index 4e3987129c..18ea90b597 100644
--- a/Modelica/Media/Incompressible.mo
+++ b/Modelica/Media/Incompressible.mo
@@ -67,7 +67,7 @@ package Incompressible
     Medium.SpecificHeatCapacity cv=Medium.specificHeatCapacityCv(medium.state);
     Medium.SpecificInternalEnergy u=Medium.specificInternalEnergy(medium.state);
     Medium.SpecificInternalEnergy h=Medium.specificEnthalpy(medium.state);
-    Medium.SpecificInternalEnergy d=Medium.density(medium.state);
+    Medium.Density d=Medium.density(medium.state);
     protected
     constant SI.Time timeUnit = 1;
     constant SI.Temperature Ta = 1;