diff --git a/CHANGELOG b/CHANGELOG
index ecc2a0a3b..3e0fce855 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,7 @@
 CHANGELOG RoundCube Webmail
 ===========================
 
+- Fix read/write database recognition (#1485811)
 - Fix quicksearchbox look in Chrome and Konqueror (#1484841)
 - Fix UTF-8 byte-order mark removing (#1485514)
 - Fix folders subscribtions on Konqueror (#1484841) 
diff --git a/program/include/rcube_mdb2.php b/program/include/rcube_mdb2.php
index 54fd35787..1c491a874 100644
--- a/program/include/rcube_mdb2.php
+++ b/program/include/rcube_mdb2.php
@@ -228,7 +228,7 @@ class rcube_mdb2
   function _query($query, $offset, $numrows, $params)
     {
     // Read or write ?
-    if (strtolower(trim(substr($query,0,6)))=='select')
+    if (strtolower(substr(trim($query),0,6))=='select')
       $mode='r';
     else
       $mode='w';