diff --git a/doc/descriptions/avision.desc b/doc/descriptions/avision.desc
index 661ba904a..f428fe8f8 100644
--- a/doc/descriptions/avision.desc
+++ b/doc/descriptions/avision.desc
@@ -14,7 +14,7 @@
 :backend "avision"
 
 ; version of backend
-:version "Build: 296"
+:version "Build: 296 (unmaintained)"
 ;status: alpha, beta, stable, new
 ;:status :stable
 
diff --git a/doc/descriptions/canon.desc b/doc/descriptions/canon.desc
index 2e54a0c6f..78a20c4df 100644
--- a/doc/descriptions/canon.desc
+++ b/doc/descriptions/canon.desc
@@ -10,7 +10,7 @@
 
 :backend "canon"		; name of backend
 :manpage "sane-canon"
-:version "1.12"			; version of backend
+:version "1.12 (unmaintained)"	; version of backend
 ;:status :good			; :alpha, :beta, :stable, :new
 
 :url "http://www.rzg.mpg.de/~mpd/sane/" ; backend home page
diff --git a/doc/descriptions/hp3500.desc b/doc/descriptions/hp3500.desc
index 700580de3..a8be5ef44 100644
--- a/doc/descriptions/hp3500.desc
+++ b/doc/descriptions/hp3500.desc
@@ -9,7 +9,7 @@
 ;
 
 :backend "hp3500"		; name of backend
-:version "1.1"			; version of backend
+:version "1.1 (unmaintained)"	; version of backend
 :manpage "sane-hp3500"		; name of manpage (if it exists)
 :url "http://projects.troy.rollo.name/rt-scanners/" ; backend's web page
 :comment "HP3500 series scanners."
diff --git a/doc/descriptions/hs2p.desc b/doc/descriptions/hs2p.desc
index d02df83f2..4e2c2b4a1 100644
--- a/doc/descriptions/hs2p.desc
+++ b/doc/descriptions/hs2p.desc
@@ -10,7 +10,7 @@
 
 :backend "hs2p"                 ; name of backend
 :url "http://www.acjlaw.net:8080/~jeremy/Ricoh/"
-:version "1.00"          ; version of backend
+:version "1.00 (unmaintained)"  ; version of backend
 ;
 :manpage "sane-hs2p"            ; name of manpage (if it exists)
 :comment "This backend has been tested with the IS450DE (Duplex/Endorser). All major functions necessary for scanning are supported. This backend should work with all Ricoh scanners in the IS450 family as well as the IS420 series, but the IS420 has not yet been tested. Features provided by the optional Image Processing Unit (IPU) are not yet integrated into the backend, as my scanner lacks the IPU."