diff --git a/Cantera/src/equil/vcs_internal.h b/Cantera/src/equil/vcs_internal.h
index d4fd32eeb..6756c4a7a 100644
--- a/Cantera/src/equil/vcs_internal.h
+++ b/Cantera/src/equil/vcs_internal.h
@@ -474,6 +474,15 @@ namespace VCSnonideal {
    */
   void vcs_print_line(const char *str, int num);
 
+  //! Returns a const char string representing the type of the
+  //! species given by the first argument
+  /*!
+   * @param speciesStatus  Species status integer representing the type
+   *                       of the species.
+   * @param length         Maximum length of the string to be returned.
+   *                       Shorter values will yield abbreviated strings.
+   *                       Defaults to a value of 100.
+   */
   const char *vcs_speciesType_string(int speciesStatus, int length = 100);
 
   //! Print a string within a given space limit