diff --git a/include/cantera/Edge.h b/include/cantera/Edge.h
index 9bf9c1cd2..54b85d6c5 100644
--- a/include/cantera/Edge.h
+++ b/include/cantera/Edge.h
@@ -9,6 +9,7 @@
 namespace Cantera
 {
 
+//! Convenience class which inherits from both EdgePhase and EdgeKinetics
 class Edge :
     public EdgePhase, public EdgeKinetics
 {
diff --git a/include/cantera/IdealGasMix.h b/include/cantera/IdealGasMix.h
index 578027bd6..b1fa286d7 100644
--- a/include/cantera/IdealGasMix.h
+++ b/include/cantera/IdealGasMix.h
@@ -10,6 +10,7 @@
 namespace Cantera
 {
 
+//! Convenience class which inherits from both IdealGasPhase and GasKinetics
 class IdealGasMix :
     public IdealGasPhase,
     public GasKinetics
diff --git a/include/cantera/IncompressibleSolid.h b/include/cantera/IncompressibleSolid.h
index 9ffe8aa03..d4b0b3759 100644
--- a/include/cantera/IncompressibleSolid.h
+++ b/include/cantera/IncompressibleSolid.h
@@ -8,6 +8,7 @@
 namespace Cantera
 {
 
+//! Wrapper for ConstDensityThermo with constructor from file
 class IncompressibleSolid : public ConstDensityThermo
 {
 public:
diff --git a/include/cantera/Metal.h b/include/cantera/Metal.h
index f0eec81d2..91463717b 100644
--- a/include/cantera/Metal.h
+++ b/include/cantera/Metal.h
@@ -8,6 +8,7 @@
 namespace Cantera
 {
 
+//! Wrapper for MetalPhase with constructor from file
 class Metal : public MetalPhase
 {
 public:
diff --git a/include/cantera/PureFluid.h b/include/cantera/PureFluid.h
index 7c5f5a57b..4d744971f 100644
--- a/include/cantera/PureFluid.h
+++ b/include/cantera/PureFluid.h
@@ -8,6 +8,7 @@
 namespace Cantera
 {
 
+//! Wrapper for PureFluidPhase with constructor from file
 class PureFluid : public PureFluidPhase
 {
 public: