diff --git a/tools/doc/Cantera.cfg.in b/tools/doc/Cantera.cfg.in
index b30aba840..348a62302 100755
--- a/tools/doc/Cantera.cfg.in
+++ b/tools/doc/Cantera.cfg.in
@@ -99,6 +99,7 @@ FILE_PATTERNS          = Kinetics.h Kinetics.cpp \
                          State.h  State.cpp \
                          Constituents.h Constituents.cpp \
                          Elements.h Elements.cpp \
+                         importCTML.cpp importCTML.h \
                          utilities.h \
                          VPStandardStateTP.h     VPStandardStateTP.cpp \
                          SingleSpeciesTP.h SingleSpeciesTP.cpp \