diff --git a/build.sh b/build.sh
index 6c799b6..9cbac5e 100755
--- a/build.sh
+++ b/build.sh
@@ -19,11 +19,11 @@ arm_version=`git log --decorate -1 | sed -n '1p' | awk '{print substr($2,0)}'`
 arm_build_date=`date +"%Y-%m-%d-%H:%M:%S"`
 
 #判断tag是否存在
-if [ -z `git log --decorate -1 | grep -oP '(?<=tag: ).*'` ]
+if [ -z `git log --decorate -1 | grep -oP '(?<=tag: ).*' | awk '{print substr($1,0)}'` ]
     then
         arm_tag="NULL";
     else
-        arm_tag=`git log --decorate -1 | grep -oP '(?<=tag: ).*'`
+        arm_tag=`git log --decorate -1 | grep -oP '(?<=tag: ).*' | awk '{print substr($1,0)}'`
         arm_tag=${arm_tag%?}
 fi