Merge pull request #3047 from Celc/patch-1

Typo boolen => boolean
diff --git a/user_guide_src/source/database/queries.rst b/user_guide_src/source/database/queries.rst
index 5d168c2..90f49af 100644
--- a/user_guide_src/source/database/queries.rst
+++ b/user_guide_src/source/database/queries.rst
@@ -83,7 +83,7 @@
 
 This function will also add a table prefix to your table, assuming you
 have a prefix specified in your database config file. To enable the
-prefixing set TRUE (boolen) via the second parameter::
+prefixing set TRUE (boolean) via the second parameter::
 
 	$this->db->protect_identifiers('table_name', TRUE);