diff --git a/pjmedia/build/os-auto.mak.in b/pjmedia/build/os-auto.mak.in
index a1a4050..a329f76 100644
--- a/pjmedia/build/os-auto.mak.in
+++ b/pjmedia/build/os-auto.mak.in
@@ -89,7 +89,7 @@
 ifeq (@ac_external_pa@,1)
 # External PA
 export CFLAGS += -DPJMEDIA_AUDIO_DEV_HAS_PORTAUDIO=1
-#else
+else
 # Our PA in third_party
 export CFLAGS += -I$(THIRD_PARTY)/build/portaudio -I$(THIRD_PARTY)/portaudio/include -DPJMEDIA_AUDIO_DEV_HAS_PORTAUDIO=1
 endif