diff --git a/install/ubuntu/15.04/templates/web/nginx/caching.sh b/install/ubuntu/15.04/templates/web/nginx/caching.sh
index 6eb9126d..09d8efe7 100755
--- a/install/ubuntu/15.04/templates/web/nginx/caching.sh
+++ b/install/ubuntu/15.04/templates/web/nginx/caching.sh
@@ -6,7 +6,14 @@ ip=$3
 home=$4
 docroot=$5
 
-str="proxy_cache_path /var/cache/nginx/$domain levels=2"
-str="$str keys_zone=$domain:10m inactive=60m max_size=512m;"
-echo "$str" >> /etc/nginx/conf.d/01_caching_pool.conf
+str="proxy_cache_path /var/cache/nginx/$domain levels=2" 
+str="$str keys_zone=$domain:10m inactive=60m max_size=512m;" 
+conf='/etc/nginx/conf.d/01_caching_pool.conf'
+if [ -e "$conf" ]; then
+    if [ -z "$(grep "=${domain}:" $conf)" ]; then
+        echo "$str" >> $conf
+    fi
+else
+    echo "$str" >> $conf
+fi