diff --git a/channels/Makefile b/channels/Makefile
index 66e2e3ff47..9081e0cf01 100644
--- a/channels/Makefile
+++ b/channels/Makefile
@@ -105,5 +105,6 @@ $(if $(filter chan_oss,$(EMBEDDED_MODS)),modules.link,chan_oss.so): console_vide
 chan_usbradio.o: ./xpmr/xpmr.c ./xpmr/xpmr.h ./xpmr/xpmr_coef.h
 
 chan_usbradio.so: LIBS+=-lusb -lasound
+chan_usbradio.so: ASTCFLAGS+=-DNDEBUG