---
 Makefile.in |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/Makefile.in
+++ b/Makefile.in
@@ -34,10 +34,10 @@ eflite: fs.o es.o soccon.o sockopen.o to
 	$(CC) $(LDFLAGS) -o $@ $^ -lm $(LIBS) $(FLITE_LIBS) $(AUDIOLIBS)
 
 fs.o: fs.c
-	$(CC) $(CFLAGS) @AUDIODEFS@ -I. -I$(flite_include_dir) -DREGISTER_VOX=register_$(subst cmu_us_kal16,cmu_us_kal,$(FL_VOX)) -DSTANDALONE -DEFLITE -c -o $@ $<
+	$(CC) $(CPPFLAGS) $(CFLAGS) @AUDIODEFS@ -I. -I$(flite_include_dir) -DREGISTER_VOX=register_$(subst cmu_us_kal16,cmu_us_kal,$(FL_VOX)) -DSTANDALONE -DEFLITE -c -o $@ $<
 
 tone.o: tone.c
-	$(CC) $(CFLAGS) -I$(flite_include_dir) -DEFLITE -c -o $@ $<
+	$(CC) $(CPPFLAGS) $(CFLAGS) -I$(flite_include_dir) -DEFLITE -c -o $@ $<
 
 DISTFILES=es.c fs.c soccon.c sockopen.c tone.c es.h language.h lookup.h synthesizer.h configure configure.in Makefile.in COPYING ChangeLog INSTALL AUTHORS CREDITS README eflite_test.txt
 release:
