diff --git a/tools/doc/Cantera.cfg.in b/tools/doc/Cantera.cfg.in
index fdf67126e..6629e6bd6 100755
--- a/tools/doc/Cantera.cfg.in
+++ b/tools/doc/Cantera.cfg.in
@@ -128,6 +128,7 @@ FILE_PATTERNS          = Kinetics.h Kinetics.cpp \
                          WaterPropsIAPWSphi.h  WaterPropsIAPWSphi.cpp \
                          WaterPropsIAPWS.h  WaterPropsIAPWS.cpp \
                          WaterSSTP.h WaterSSTP.cpp \
+                         WaterProps.h WaterProps.cpp \
                          PureFluidPhase.h PureFluidPhase.cpp \
                          equil.h MultiPhase.h MultiPhase.cpp BasisOptimize.cpp \
                          Nasa9Poly1.h Nasa9Poly1.cpp \