diff --git a/package/libpjsip/libpjsip.mk b/package/libpjsip/libpjsip.mk
index 84919fdc10..b89249a6e5 100644
--- a/package/libpjsip/libpjsip.mk
+++ b/package/libpjsip/libpjsip.mk
@@ -49,6 +49,13 @@ LIBPJSIP_CONF_OPTS = \
 # so we want to use it.
 LIBPJSIP_CONF_OPTS += --enable-epoll
 
+ifeq ($(BR2_PACKAGE_BCG729),y)
+LIBPJSIP_DEPENDENCIES += bcg729
+LIBPJSIP_CONF_OPTS += --with-bcg729=$(STAGING_DIR)/usr
+else
+LIBPJSIP_CONF_OPTS += --disable-bcg729
+endif
+
 ifeq ($(BR2_PACKAGE_LIBGSM),y)
 LIBPJSIP_CONF_OPTS += \
 	--enable-gsm-codec \