diff --git a/codecs/Makefile b/codecs/Makefile
index bb0de75829..f476e8a2b6 100644
--- a/codecs/Makefile
+++ b/codecs/Makefile
@@ -42,14 +42,14 @@ clean::
 
 gsm/lib/libgsm.a:
 	@mkdir -p gsm/lib
-	@CFLAGS="$(ASTCFLAGS) -I." $(MAKE) -C gsm lib/libgsm.a
+	@CFLAGS="$(CFLAGS) -I." $(MAKE) -C gsm lib/libgsm.a
 
 $(LIBLPC10):
-	@CFLAGS="$(ASTCFLAGS)" $(MAKE) -C lpc10 all
+	@$(MAKE) -C lpc10 all
 
 codec_lpc10.so: $(LIBLPC10)
 
 $(LIBILBC):
-	@CFLAGS="$(ASTCFLAGS)" $(MAKE) -C ilbc all
+	@$(MAKE) -C ilbc all
 
 codec_ilbc.so: $(LIBILBC)