diff --git a/set_swap.sh b/set_swap.sh
index 09da289..6817a71 100644
--- a/set_swap.sh
+++ b/set_swap.sh
@@ -32,7 +32,7 @@ function set_swap(){
 }
 
 #判断当前是否开启了虚拟内存
-if [ swapon -s ]
+if swapon -s
 then
 	echo 'You have already set up swap, there is no need to repeat the settings.'
 	exit