diff --git a/tools/doc/Cantera.cfg.in b/tools/doc/Cantera.cfg.in
index 573680bdb..44b3c9ce8 100755
--- a/tools/doc/Cantera.cfg.in
+++ b/tools/doc/Cantera.cfg.in
@@ -103,6 +103,7 @@ FILE_PATTERNS          = Kinetics.h Kinetics.cpp \
                          ThermoFactory.h ThermoFactory.cpp \
                          SpeciesThermoFactory.h SpeciesThermoFactory.cpp \
                          speciesThermoTypes.h SpeciesThermoMgr.h SpeciesThermo.h SpeciesThermoInterpTypes.h \
+                         NasaThermo.h NasaPoly1.h NasaPoly2.h \
                          utilities.h \
                          VPStandardStateTP.h     VPStandardStateTP.cpp \
                          SingleSpeciesTP.h SingleSpeciesTP.cpp \