diff --git a/docs/guide/extensions.md b/docs/guide/extensions.md
index 65546b1..4f178ef 100644
--- a/docs/guide/extensions.md
+++ b/docs/guide/extensions.md
@@ -47,7 +47,7 @@ Working with database
 ---------------------
 
 - If extension creates or modifies database schema always use Yii migrations instead of SQL files or custom scripts.
-- Migrations SHOULD be database agnostic.
+- Migrations SHOULD be DBMS agnostic.
 - You MUST NOT make use of active-record model classes in your migrations.
 
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