diff --git a/include/cantera/thermo/AdsorbateThermo.h b/include/cantera/thermo/AdsorbateThermo.h
index d5fbea263..1589dca39 100644
--- a/include/cantera/thermo/AdsorbateThermo.h
+++ b/include/cantera/thermo/AdsorbateThermo.h
@@ -67,9 +67,11 @@ public:
         return (SpeciesThermoInterpType*) np;
     }
 
+    //! @deprecated Not a member of the base class
     virtual void install(const std::string& name, size_t index, int type,
                          const doublereal* c, doublereal minTemp_, doublereal maxTemp_,
                          doublereal refPressure_) {
+        warn_deprecated("Adsorbate::install", "Not a member of the base class.");
         m_be = c[1];
         m_nFreqs = int(c[0]);
         for (size_t n = 0; n < m_nFreqs; n++) {