diff --git a/plugins/mysql/versions/5.5/install.sh b/plugins/mysql/versions/5.5/install.sh
index cf3d7d9fc..d530dc2fa 100755
--- a/plugins/mysql/versions/5.5/install.sh
+++ b/plugins/mysql/versions/5.5/install.sh
@@ -165,8 +165,8 @@ Install_mysql()
 		export CFLAGS="-D__s64=long long -D__u64='unsigned long long' -D__s32=int -D__u32='unsigned int' -D__u16='unsigned short'"
 		export CXXFLAGS="$CFLAGS"
 
-		OPTIONS="${OPTIONS} -DCMAKE_C_FLAGS=$CFLAGS"
-		OPTIONS="${OPTIONS} -DCMAKE_CXX_FLAGS=$CXXFLAGS"
+		OPTIONS="${OPTIONS} -DCMAKE_C_FLAGS=${CFLAGS}"
+		OPTIONS="${OPTIONS} -DCMAKE_CXX_FLAGS=${CXXFLAGS}"
 	fi
 
 	if [ ! -d $serverPath/mysql ];then