diff --git a/conf/sample.ini b/conf/sample.ini
index 7a5dc6a38c5..22921822f1d 100644
--- a/conf/sample.ini
+++ b/conf/sample.ini
@@ -94,7 +94,8 @@
 # Example: mysql://user:secret@host:port/database
 ;url =
 
-# For "postgres" only, either "disable", "require" or "verify-full"
+# For "postgres", use either "disable", "require" or "verify-full"
+# For "mysql", use either "true", "false", or "skip-verify".
 ;ssl_mode = disable
 
 # Database drivers may support different transaction isolation levels.