1 files changed, 5 insertions, 0 deletions
diff --git a/program/include/rcube_addressbook.php b/program/include/rcube_addressbook.php
index f6de6d70e..9ebd37f0b 100644
--- a/program/include/rcube_addressbook.php
+++ b/program/include/rcube_addressbook.php
@@ -431,6 +431,11 @@ abstract class rcube_addressbook
             }
         }
 
+        // remove duplicates
+        if ($flat && !empty($out)) {
+            $out = array_unique($out);
+        }
+
         return $out;
     }