diff --git a/Makefile.in b/Makefile.in
index 5eafb9673..4333e272d 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -252,7 +252,7 @@ endif
 version.exe: $(srcdir)/version.c $(srcdir)/version_base.h version_tag.h
 	$(BUILDCC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o version.exe -I. -I$(srcdir) $(srcdir)/version.c
 
-%.o: %.cc config.h
+%.o: %.cc config.h | dep
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
 	mv $*.d dep/$*.d
 
diff --git a/vhdlpp/Makefile.in b/vhdlpp/Makefile.in
index 2a8e0757c..27babf4e4 100644
--- a/vhdlpp/Makefile.in
+++ b/vhdlpp/Makefile.in
@@ -104,11 +104,11 @@ dep:
 vhdlpp@EXEEXT@: $O
 	$(CXX) -o vhdlpp@EXEEXT@ $(LDFLAGS) $O $(LIBS)
 
-%.o: $(srcdir)/../libmisc/%.cc
+%.o: $(srcdir)/../libmisc/%.cc | dep
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
 	mv $*.d dep/$*.d
 
-%.o: %.cc vhdlpp_config.h
+%.o: %.cc vhdlpp_config.h | dep
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
 	mv $*.d dep/$*.d
 
diff --git a/vvp/Makefile.in b/vvp/Makefile.in
index 3996ee567..941ffdee1 100644
--- a/vvp/Makefile.in
+++ b/vvp/Makefile.in
@@ -159,11 +159,11 @@ vvp@EXEEXT@: $O main.o
 endif
 endif
 
-%.o: %.cc config.h
+%.o: %.cc config.h | dep
 	$(CXX) $(CPPFLAGS) -DIVL_SUFFIX='"$(suffix)"' $(MDIR1) $(MDIR2) $(CXXFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
 	mv $*.d dep/$*.d
 
-%.o: %.c config.h
+%.o: %.c config.h | dep
 	$(CC) $(CPPFLAGS) $(MDIR1) $(MDIR2) $(CFLAGS) @DEPENDENCY_FLAG@ -c $< -o $*.o
 	mv $*.d dep/$*.d