diff --git a/lfs/sox b/lfs/sox
index de60c9036..8a2aec646 100644
--- a/lfs/sox
+++ b/lfs/sox
@@ -77,6 +77,7 @@ $(subst %,%_MD5,$(objects)) :
 $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 	@$(PREBUILD)
 	@rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar zxf $(DIR_DL)/$(DL_FILE)
+	$(UPDATE_AUTOMAKE)
 	cd $(DIR_APP) && ./configure --prefix=/usr --disable-alsa-dsp --disable-oss-dsp \
 				--disable-sun-audio --disable-mad
 	cd $(DIR_APP) && make $(EXTRA_MAKE)