diff --git a/debian/changelog b/debian/changelog
index 25e76093..ac6de096 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -5,6 +5,7 @@ byobu (4.35) unreleased; urgency=low
       previous fix just enabled it everywhere
   * debian/postinst, usr/bin/byobu-janitor:
     - smooth upgrades from older byobu (<= 4.0)
+    - automatically reload default byobu launched sessions on upgrade
   * usr/lib/byobu/reboot_required:
     - fix path
 
diff --git a/debian/postinst b/debian/postinst
index 4376afe2..4e7e5d67 100644
--- a/debian/postinst
+++ b/debian/postinst
@@ -32,7 +32,7 @@ touch_flag() {
 }
 [ -r "/etc/$PKG/socketdir" ] && . "/etc/$PKG/socketdir"
 if [ -d "$SOCKETDIR" ]; then
-	for d in "$SOCKETDIR"/*; do
+	for d in "$SOCKETDIR"/S-*; do
 		if [ -d "$d/$PKG" ]; then
 			# New location of the reload flag
 			touch_flag "$d/$PKG/reload-required"
@@ -43,6 +43,19 @@ if [ -d "$SOCKETDIR" ]; then
 	done
 fi
 
+# Reload byobu sessions
+for p in /var/run/screen/S-*/*.$PKG; do
+	pid=$(echo "$p" | sed -e "s:.*/::" -e "s:\..*::")
+	if [ -p "$p" ] && (ps -o cmd "$pid"  | grep -qs "^SCREEN -S $PKG -c "); then
+		u=$(stat -c %U "$p")
+		h=$(getent passwd "$u" | awk -F: '{print $6}')
+		if [ -f "$h/.$PKG/profile" ]; then
+			s=$(basename "$p")
+			su -l "$u" -c "screen -S $s -X at 0 source '$h/.$PKG/profile'" >/dev/null 2>&1 || true
+		fi
+	fi
+done
+
 #DEBHELPER#
 
 # vi: syntax=sh ts=4 noexpandtab