diff --git a/tools/profiling/dump_node b/tools/profiling/dump_node
index 168158c6..34d4b630 100755
--- a/tools/profiling/dump_node
+++ b/tools/profiling/dump_node
@@ -1,13 +1,13 @@
 #! /bin/sh
 
-NODE=${1:-localhost}
-PORT=${2:-4949}
+NODE="${1:-localhost}"
+PORT="${2:-4949}"
 
 {
-	for plugin in $(echo "list" | nc $NODE $PORT | tail -n 1)
+	for plugin in $(echo "list" | nc "$NODE" "$PORT" | tail -n 1)
 	do
 		echo "config $plugin"
 		echo "fetch $plugin"
 	done 
 	echo "quit"
-} | nc $NODE $PORT
+} | nc "$NODE" "$PORT"