diff --git a/src/thermo/ConstDensityThermo.cpp b/src/thermo/ConstDensityThermo.cpp
index 420f53adbb..e3edba6c4e 100644
--- a/src/thermo/ConstDensityThermo.cpp
+++ b/src/thermo/ConstDensityThermo.cpp
@@ -59,7 +59,7 @@ void ConstDensityThermo::getActivityCoefficients(doublereal* ac) const
doublereal ConstDensityThermo::standardConcentration(size_t k) const
{
- return molarDensity();
+ return density()/molecularWeight(k);
}
void ConstDensityThermo::getChemPotentials(doublereal* mu) const
diff --git a/test/data/sofc-test.xml b/test/data/sofc-test.xml
index ea7bbaf2a0..fbebb19dbf 100644
--- a/test/data/sofc-test.xml
+++ b/test/data/sofc-test.xml
@@ -40,11 +40,11 @@
101325.0
Ox:0.95 VO**:0.05
-
+
0.7
-
-
+
+
@@ -132,6 +132,9 @@
0.0
+
+ 0.0018
+
@@ -146,6 +149,9 @@
0.0
+
+ 0.0018
+