diff --git a/build_ios.sh b/build_ios.sh
index 95fcf3b..d0a0a4d 100755
--- a/build_ios.sh
+++ b/build_ios.sh
@@ -50,6 +50,8 @@ build_lame
 PLATFORM="armv7s"
 build_lame
 
+PLATFORM="arm64"
+build_lame
 
 # remove old libmp3lame.a or lipo will failed
 OUTPUT_LIB=${OUTPUT_FOLDER}/libmp3lame.a