diff --git a/Cantera/src/thermo/.cvsignore b/Cantera/src/thermo/.cvsignore
index 248566acf..ced4947e3 100644
--- a/Cantera/src/thermo/.cvsignore
+++ b/Cantera/src/thermo/.cvsignore
@@ -8,3 +8,4 @@ HKFT_PDSS.h
  TODO.txt
 WaterEps.cpp
 WaterEps.h
+.*swp
diff --git a/Cantera/src/thermo/Makefile.in b/Cantera/src/thermo/Makefile.in
index 85db48be8..028bb932c 100644
--- a/Cantera/src/thermo/Makefile.in
+++ b/Cantera/src/thermo/Makefile.in
@@ -86,7 +86,7 @@ all: $(LIB) .depends
 	@(for lh in $(CATHERMO_H) ; do \
 	  $(INSTALL_TSC) "$${lh}" $(INCDIR) ; \
 	done)
-%.d:
+%.d: Makefile $*.o
 	@CXX_DEPENDS@ $(CXX_FLAGS) $(CXX_INCLUDES) $*.cpp > $*.d
 
 .cpp.o: