diff --git a/debian/preinst b/debian/preinst
new file mode 100755
index 0000000..513e294
--- /dev/null
+++ b/debian/preinst
@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+
+# generate correct pid file, for versions where was non or incorrect
+if [ "$1" = "upgrade" ] && [ "$2" ] && dpkg --compare-versions "$2" <= "1.06-6"; then
+	ps aux | grep /usr/bin/ps-watcher | head -1 | awk '{ print $2 }' > /var/run/ps-watcher.pid
+fi
+#DEBHELPER#