diff --git a/cde/lib/DtWidget/Makefile.am b/cde/lib/DtWidget/Makefile.am
index 0ae49560f..11237e8e9 100644
--- a/cde/lib/DtWidget/Makefile.am
+++ b/cde/lib/DtWidget/Makefile.am
@@ -43,7 +43,6 @@ libDtWidget_la_SOURCES = ComboBox.c      Control.c       DialogBox.c \
 BUILT_SOURCES = UNIXbindings
 CLEANFILES = UNIXbindings
 
-CPPTARGET = UNIXbindings
-CPPSRC = UNIXbindings.cpp
-
-include $(top_builddir)/include/cppfile.inc
+UNIXbindings: UNIXbindings.cpp
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
diff --git a/cde/lib/tt/bin/scripts/Makefile.am b/cde/lib/tt/bin/scripts/Makefile.am
index f252a3847..96cf914d5 100644
--- a/cde/lib/tt/bin/scripts/Makefile.am
+++ b/cde/lib/tt/bin/scripts/Makefile.am
@@ -8,7 +8,8 @@ CLEANFILES = ttce2xdr
 
 AM_CPPFLAGS = $(TIRPCINC) $(TT_VERSION_DEFINE)
 
-CPPTARGET = ttce2xdr
-CPPSRC = ttce2xdr.cpp
 
-include $(top_builddir)/include/cppfile.inc
+ttce2xdr: ttce2xdr.cpp
+	$(RM) $@
+	$(GENCPP) -P -DXCOMM=# $(AM_CPPFLAGS) $< > $@
+