diff --git a/docs/howto/vet.md b/docs/howto/vet.md
index 3f6c6a025b..c7f5073af2 100644
--- a/docs/howto/vet.md
+++ b/docs/howto/vet.md
@@ -77,7 +77,7 @@ rules:
   - name: no-delete
     message: "don't use delete statements"
     rule: |
-      query.sql.contains("DELETE")
+      query.sql.lowerAscii().contains("delete ")
   - name: only-one-param
     message: "too many parameters"
     rule: |
@@ -253,7 +253,7 @@ rules:
   - name: no-delete
     message: "don't use delete statements"
     rule: |
-      query.sql.contains("DELETE")
+      query.sql.lowerAscii().contains("delete ")
 ```
 
 ### Opting-out of lint rules