diff --git a/src/mod/asr_tts/mod_cepstral/Makefile b/src/mod/asr_tts/mod_cepstral/Makefile
index 755d08153c..f156bc038d 100644
--- a/src/mod/asr_tts/mod_cepstral/Makefile
+++ b/src/mod/asr_tts/mod_cepstral/Makefile
@@ -1,5 +1,5 @@
 ifeq ($(OSARCH),Darwin)
-CFLAGS += -L/Library/Frameworks/swift.framework/Versions/4 -I/Library/Frameworks/swift.framework/Versions/4/Headers
+CFLAGS += -I/Library/Frameworks/swift.framework/Versions/4/Headers
 LDFLAGS += -framework swift
 else
 LDFLAGS += -L/opt/swift/lib -lswift -lceplex_us -lceplang_en -lceplang_de -lceplang_es -lceplang_fr -lceplang_it -lm