diff --git a/network/nsca/rc.nsca b/network/nsca/rc.nsca
index caa5846b6a..f62749f822 100644
--- a/network/nsca/rc.nsca
+++ b/network/nsca/rc.nsca
@@ -34,7 +34,7 @@ getpid()
     echo "Pid file $PIDFILE not found."
     exit 1
   else
-    PID=`head -n 1 $PIDFILE`
+    PID=$(head -n 1 $PIDFILE)
   fi
 }