diff --git a/setup/so-functions b/setup/so-functions
index 1e7bf7951..38b0b5b9a 100755
--- a/setup/so-functions
+++ b/setup/so-functions
@@ -1478,7 +1478,7 @@ use_proxy() {
 
 	if [[ $OS == 'centos' ]]; then
 		printf '%s\n'\
-			"proxy=\"$proxy_addr\"" >> /etc/yum.conf
+			"proxy=$proxy_addr" >> /etc/yum.conf
 	else
 		printf '%s\n'\
 			"Acquire {"\