diff --git a/shell/natpmpcd b/shell/natpmpcd
index 83114bb..16ef5ee 100755
--- a/shell/natpmpcd
+++ b/shell/natpmpcd
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-PORT=$(natpmpc -a 1 0 udp 60 -g 10.2.0.1 | awk '/Mapped public/ {print $4}')
+PORT=$(natpmpc -a 1 0 udp 60 -g 10.2.0.1 | grep "Mapped public port" | awk '{print $4}')
 echo "$PORT" | tee /usr/local/etc/natvpn_port.txt
 
 while true; do