diff --git a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/connectiongroup/ConnectionGroupMapper.xml b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/connectiongroup/ConnectionGroupMapper.xml
index f437e51a0..3acf3731f 100644
--- a/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/connectiongroup/ConnectionGroupMapper.xml
+++ b/extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-postgresql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/connectiongroup/ConnectionGroupMapper.xml
@@ -83,7 +83,7 @@
         WHERE connection_group_id IN
             <foreach collection="identifiers" item="identifier"
                      open="(" separator="," close=")">
-                #{identifier,jdbcType=INTEGER}
+                #{identifier,jdbcType=INTEGER}::integer
             </foreach>
 
     </select>