diff --git a/CHANGELOG b/CHANGELOG
index 36f9bd8b6..3a71e59c2 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -12,6 +12,7 @@ CHANGELOG Roundcube Webmail
 - Fix so update.sh script warns about changed defaults (#7011)
 - Fix tables listing routine when DSN contained a database with unsupported suffix (#7034)
 - Fix so Elastic is also a default in jqueryui plugin (#7039)
+- Fix bug where the Installer would not warn about required schema upgrade (#7042)
 
 RELEASE 1.4.0
 -------------
diff --git a/program/include/rcmail_install.php b/program/include/rcmail_install.php
index ae5a6bcbd..ebd23417d 100644
--- a/program/include/rcmail_install.php
+++ b/program/include/rcmail_install.php
@@ -463,9 +463,23 @@ class rcmail_install
 
         // read reference schema from mysql.initial.sql
         $engine    = $db->db_provider;
-        $db_schema = $this->db_read_schema(INSTALL_PATH . "SQL/$engine.initial.sql");
+        $db_schema = $this->db_read_schema(INSTALL_PATH . "SQL/$engine.initial.sql", $schema_version);
         $errors    = array();
 
+        // Just check the version
+        if ($schema_version) {
+            $version = rcmail_utils::db_version();
+
+            if (empty($version)) {
+                $errors[] = "Schema version not found";
+            }
+            else if ($schema_version != $version) {
+                $errors[] = "Schema version: {$version} (required: {$schema_version})";
+            }
+
+            return !empty($errors) ? $errors : false;
+        }
+
         // check list of tables
         $existing_tables = $db->list_tables();
 
@@ -491,7 +505,7 @@ class rcmail_install
     /**
      * Utility function to read database schema from an .sql file
      */
-    private function db_read_schema($schemafile)
+    private function db_read_schema($schemafile, &$version = null)
     {
         $lines    = file($schemafile);
         $schema   = array();
@@ -503,6 +517,9 @@ class rcmail_install
                 $table_name = end($table_name);
                 $table_name = preg_replace('/[`"\[\]]/', '', $table_name);
             }
+            else if (preg_match('/insert into/i', $line) && preg_match('/\'roundcube-version\',\s*\'([0-9]+)\'/', $line, $m)) {
+                $version = $m[1];
+            }
             else if ($table_name && ($line = trim($line))) {
                 if ($line == 'GO' || $line[0] == ')' || $line[strlen($line)-1] == ';') {
                     $table_name = null;
diff --git a/program/include/rcmail_utils.php b/program/include/rcmail_utils.php
index 78f38646a..ca1359355 100644
--- a/program/include/rcmail_utils.php
+++ b/program/include/rcmail_utils.php
@@ -112,13 +112,7 @@ class rcmail_utils
 
         // Read DB schema version from database (if 'system' table exists)
         if (in_array($db->table_name('system'), (array)$db->list_tables())) {
-            $db->query("SELECT `value`"
-                . " FROM " . $db->table_name('system', true)
-                . " WHERE `name` = ?",
-                $package . '-version');
-
-            $row     = $db->fetch_array();
-            $version = preg_replace('/[^0-9]/', '', $row[0]);
+            $version = self::db_version($package);
         }
 
         // DB version not found, but release version is specified
@@ -253,6 +247,28 @@ class rcmail_utils
         return $db->is_error();
     }
 
+    /**
+     * Get version string for the specified package
+     *
+     * @param string $package Package name
+     *
+     * @return string Version string
+     */
+    public static function db_version($package = 'roundcube')
+    {
+        $db = self::db();
+
+        $db->query("SELECT `value`"
+            . " FROM " . $db->table_name('system', true)
+            . " WHERE `name` = ?",
+            $package . '-version');
+
+        $row     = $db->fetch_array();
+        $version = preg_replace('/[^0-9]/', '', $row[0]);
+
+        return $version;
+    }
+
     /**
      * Removes all deleted records older than X days
      *