diff --git a/contrib/_subversion b/contrib/_subversion
index 5ed0a6ca..643ba0d6 100644
--- a/contrib/_subversion
+++ b/contrib/_subversion
@@ -1,3 +1,6 @@
+# Use of this file is deprecated.  Upstream completion is available in
+# subversion >= 0.12.0, use that instead.
+
 # svn completion
 
 have svn &&
diff --git a/contrib/_yum b/contrib/_yum
index d566d1fd..2c3f3eeb 100644
--- a/contrib/_yum
+++ b/contrib/_yum
@@ -1,3 +1,6 @@
+# Use of this file is deprecated.  Upstream completion is available in
+# yum >= 3.2.25, use that instead.
+
 # yum(8) completion
 
 have yum && {
diff --git a/contrib/_yum-utils b/contrib/_yum-utils
index 4e2cf00b..1914ba0a 100644
--- a/contrib/_yum-utils
+++ b/contrib/_yum-utils
@@ -1,3 +1,6 @@
+# Use of this file is deprecated.  Upstream completion is available in
+# yum-utils >= 1.1.24, use that instead.
+
 # bash completion for repomanage
 
 have repomanage &&