diff --git a/interfaces/matlab/toolbox/@ThermoPhase/meanMolarMass.m b/interfaces/matlab/toolbox/@ThermoPhase/meanMolarMass.m
index 6d2af4ffa..c6489fa0a 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/meanMolarMass.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/meanMolarMass.m
@@ -1,8 +1,9 @@
-function wtm = meanMolarMass(tp)
+function mmm = meanMolarMass(tp)
 % MEANMOLARMASS - Mean molar mass [kg/kmol].
 %
 %   The mean molar mass is the mole-fraction-weighted sum of the
 %   molar masses of the individual species in the phase.
 %
 
-wtm = phase_get(tp.tp_id, 4);
+warning('Deprecated in favor of meanMolecularWeight.m')
+mmm = meanMolecularWeight(tp);
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/meanMolecularWeight.m b/interfaces/matlab/toolbox/@ThermoPhase/meanMolecularWeight.m
index 3ff709428..c26053ed6 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/meanMolecularWeight.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/meanMolecularWeight.m
@@ -1,4 +1,4 @@
-function wtm = meanMolecularWeight(tp)
+function mmw = meanMolecularWeight(tp)
 % MEANMOLECULARWEIGHT - Mean molecular weight.
 %
 %    This method is a synonym for method meanMolarMass and is
@@ -7,4 +7,4 @@ function wtm = meanMolecularWeight(tp)
 %    See also; meanMolarMass
 %
 
-wtm = meanMolarMass(tp);
+mmw = phase_get(tp.tp_id,4);
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/molarMasses.m b/interfaces/matlab/toolbox/@ThermoPhase/molarMasses.m
index 8c91603f6..fc051e9a2 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/molarMasses.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/molarMasses.m
@@ -1,5 +1,6 @@
-function x = molarMasses(tp)
+function mm = molarMasses(tp)
 % MOLARMASSES - Array of species molar masses [kg/kmol].
 %
 
-x = phase_get(tp.tp_id, 22);
+warning('Deprecated in favor of molecularWeights.m')
+mm = molecularWeights(tp);
diff --git a/interfaces/matlab/toolbox/@ThermoPhase/molecularWeights.m b/interfaces/matlab/toolbox/@ThermoPhase/molecularWeights.m
index 58d91f399..96201172b 100644
--- a/interfaces/matlab/toolbox/@ThermoPhase/molecularWeights.m
+++ b/interfaces/matlab/toolbox/@ThermoPhase/molecularWeights.m
@@ -1,8 +1,9 @@
-function x = molecularWeights(a)
+function mw = molecularWeights(tp)
 % MOLECULARWEIGHTS - Array of species molar masses [kg/kmol].
 %
 %   This method is deprecated - use molarMasses instead.
 %
 %   See also: molarMasses
 %
-x = molarMasses(a);
+
+mw = phase_get(tp.tp_id, 22);