diff --git a/include/cantera/base/ct_defs.h b/include/cantera/base/ct_defs.h
index f8014d778..d2dd162da 100644
--- a/include/cantera/base/ct_defs.h
+++ b/include/cantera/base/ct_defs.h
@@ -173,22 +173,6 @@ const doublereal Undef = -999.1234;
  */
 const doublereal Tiny = 1.e-20;
 
-//! inline function to return the max value of two doubles.
- /*!
-  * @param x  double value
-  * @param y  second double value
-  */
-inline doublereal fmaxx(doublereal x, doublereal y)
-{ return (x > y) ? x : y; }
-
-//! inline function to return the min value of two doubles.
-/*!
- * @param x  double value
- * @param y  second double value
- */
-inline doublereal fminn(doublereal x, doublereal y)
-{ return (x < y) ? x : y; }
-
 //! Map connecting a string name with a double.
 /*!
  * This is used mostly to assign concentrations and mole fractions