noinst_HEADERS = \
l2tp_event.h
-pppol2tp_la_CFLAGS = -I${top_srcdir}/include -I${top_srcdir}/pppd
+pppol2tp_la_CPPFLAGS = -I${top_srcdir}/include -I${top_srcdir}/pppd
pppol2tp_la_LDFLAGS = -module -avoid-version
pppol2tp_la_SOURCES = pppol2tp.c
-openl2tp_la_CFLAGS = -I${top_srcdir}/include -I${top_srcdir}/pppd
+openl2tp_la_CPPFLAGS = -I${top_srcdir}/include -I${top_srcdir}/pppd
openl2tp_la_LDFLAGS = -module -avoid-version
openl2tp_la_SOURCES = openl2tp.c