diff --git a/run/power.sh b/run/power.sh
index b6556f0..efa1f63 100644
--- a/run/power.sh
+++ b/run/power.sh
@@ -32,7 +32,7 @@ _graceful_shutdown(){
   # Don't send the powerdown signal because vDSM ignores ACPI signals
   # echo 'system_powerdown' | nc -q 1 -w 1 localhost "${QEMU_MONPORT}" > /dev/null
 
-  # Send shutdown command to guest agent tools instead via serial port
+  # Send shutdown command instead via serial port
   RESPONSE=$(curl -s -m 2 -S http://127.0.0.1:2210/write?command=6 2>&1)
 
   if [[ ! "${RESPONSE}" =~ "\"success\"" ]] ; then
@@ -40,9 +40,9 @@ _graceful_shutdown(){
     echo
     echo "Could not send shutdown command to guest, error: $RESPONSE"
 
+    AGENT_VERSION=1
     AGENT="${STORAGE}/${BASE}.agent"
-    [ ! -f "$AGENT" ] && echo "1" > "$AGENT"
-    AGENT_VERSION=$(cat "${AGENT}")
+    [ -f "$AGENT" ] && AGENT_VERSION=$(cat "${AGENT}")
 
     if ((AGENT_VERSION < 2)); then