diff --git a/addons/Makefile b/addons/Makefile
index cd12ab78ba..3faa9ccf52 100644
--- a/addons/Makefile
+++ b/addons/Makefile
@@ -49,3 +49,4 @@ chan_ooh323.o: _ASTCFLAGS+=$(H323CFLAGS)
 $(if $(filter chan_ooh323,$(EMBEDDED_MODS)),modules.link,chan_ooh323.so): _ASTCFLAGS+=$(H323CFLAGS)
 $(if $(filter chan_ooh323,$(EMBEDDED_MODS)),modules.link,chan_ooh323.so): _ASTLDFLAGS+=-lrt
 $(if $(filter chan_ooh323,$(EMBEDDED_MODS)),modules.link,chan_ooh323.so): $(addprefix ooh323c/src/,$(H323OBJS)) chan_ooh323.o ooh323cDriver.o
+$(addprefix ooh323c/src/,$(H323OBJS)) chan_ooh323.o ooh323cDriver.o: _ASTCFLAGS+=$(call MOD_ASTCFLAGS,chan_ooh323)