diff --git a/src/Monitoring/ReplyPruning.coffee b/src/Monitoring/ReplyPruning.coffee
index 1c419ba02..ffccecbbc 100644
--- a/src/Monitoring/ReplyPruning.coffee
+++ b/src/Monitoring/ReplyPruning.coffee
@@ -56,6 +56,12 @@ ReplyPruning =
   node: ->
     ReplyPruning.thread = @
 
+    if @isSticky
+      ReplyPruning.active = ReplyPruning.inputs.enabled.checked = true
+      if QuoteThreading.input
+        # Disable Quote Threading for this thread but don't save the setting.
+        Conf['Thread Quotes'] = QuoteThreading.input.checked = false
+
     @posts.forEach (post) ->
       if post.isReply
         ReplyPruning.total++
diff --git a/src/config/Config.coffee b/src/config/Config.coffee
index 69291e027..23996f391 100644
--- a/src/config/Config.coffee
+++ b/src/config/Config.coffee
@@ -407,11 +407,11 @@ Config =
       ]
       'Reply Pruning': [
         true
-        'Hide old replies in long threads. Number of replies shown can be set from header menu.'
+        'Add option in header menu to hide old replies in long threads. Activated by default in stickies.'
       ]
       'Prune by Default': [
         false
-        'Turn Reply Pruning on by default in all threads, except when navigating to a post that would be hidden.'
+        'Activate Reply Pruning by default in all threads.'
         1
       ]