diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php
index 9cbc425c..b78aa4d6 100644
--- a/classes/pref/prefs.php
+++ b/classes/pref/prefs.php
@@ -164,7 +164,7 @@ class Pref_Prefs extends Handler_Protected {
 
 		global $access_level_names;
 
-		$prefs_blacklist = array("STRIP_UNSAFE_TAGS", "REVERSE_HEADLINES",
+		$prefs_blacklist = array("ALLOW_DUPLICATE_POSTS", "STRIP_UNSAFE_TAGS", "REVERSE_HEADLINES",
 			"SORT_HEADLINES_BY_FEED_DATE", "DEFAULT_ARTICLE_LIMIT",
 			"FEEDS_SORT_BY_UNREAD");
 
diff --git a/include/rssfuncs.php b/include/rssfuncs.php
index cd82481b..ad956cd2 100755
--- a/include/rssfuncs.php
+++ b/include/rssfuncs.php
@@ -750,25 +750,7 @@
 					db_query("UPDATE ttrss_entries SET date_updated = NOW()
 						WHERE id = '$base_entry_id'");
 
-                    // if we allow duplicate posts, we have to continue to
-                    // create the user entries for this feed (if needed)
-                    if (get_pref("ALLOW_DUPLICATE_POSTS", $owner_uid, false)) {
-
-						$query = "SELECT int_id FROM ttrss_user_entries WHERE
-							ref_id = '$base_entry_id' AND owner_uid = '$owner_uid'
-							AND (feed_id = '$feed' OR feed_id IS NULL) LIMIT 1";
-
-						$result = db_query($query);
-
-						if (db_num_rows($result) == 0) {
-							_debug("allow duplicate posts is enabled and user record is not found, continuing.");
-						} else {
-							continue;
-						}
-
-					} else {
-						continue;
-					}
+					continue;
 				}
 
 				_debug("hash differs, applying plugin filters:", $debug_enabled);
@@ -944,16 +926,8 @@
 
 					// check for user post link to main table
 
-					// do we allow duplicate posts with same GUID in different feeds?
-					if (get_pref("ALLOW_DUPLICATE_POSTS", $owner_uid, false)) {
-						$dupcheck_qpart = "AND (feed_id = '$feed' OR feed_id IS NULL)";
-					} else {
-						$dupcheck_qpart = "";
-					}
-
 					$query = "SELECT ref_id, int_id FROM ttrss_user_entries WHERE
-							ref_id = '$ref_id' AND owner_uid = '$owner_uid'
-							$dupcheck_qpart";
+							ref_id = '$ref_id' AND owner_uid = '$owner_uid'";
 
 //					if ($_REQUEST["xdebug"]) print "$query\n";