diff --git a/plugins/mysql/versions/5.5/install.sh b/plugins/mysql/versions/5.5/install.sh
index 2a0912aa0..36ab1e646 100755
--- a/plugins/mysql/versions/5.5/install.sh
+++ b/plugins/mysql/versions/5.5/install.sh
@@ -73,7 +73,7 @@ Install_mysql()
 	fi
 
 	if [ ! -f $WHERE_DIR_GPP ];then
-		WHERE_DIR_GCC=`which g++`
+		WHERE_DIR_GPP=`which g++`
 	fi
 
 	if [ ! -d $serverPath/mysql ];then