diff --git a/include/cantera/equil/ChemEquil.h b/include/cantera/equil/ChemEquil.h
index d51e9785e9a..d2184e79e37 100644
--- a/include/cantera/equil/ChemEquil.h
+++ b/include/cantera/equil/ChemEquil.h
@@ -53,6 +53,7 @@ class EquilOpt
 
 /**
  * @defgroup equil Chemical Equilibrium
+ * Chemical equilibrium calculations.
  */
 
 /**
diff --git a/include/cantera/equil/MultiPhase.h b/include/cantera/equil/MultiPhase.h
index 5b1410ac370..8306c9a110a 100644
--- a/include/cantera/equil/MultiPhase.h
+++ b/include/cantera/equil/MultiPhase.h
@@ -17,8 +17,9 @@ namespace Cantera
 
 class ThermoPhase;
 
-//! @defgroup equilfunctions Classes and functions used for calculating
-//!     chemical equilibrium.
+//! @defgroup equilfunctions Chemical Equilibrium Calculations
+//! Classes and functions used for calculating chemical equilibrium.
+//! @ingroup equil
 
 //! A class for multiphase mixtures. The mixture can contain any
 //! number of phases of any type.