Index: vim/runtime/syntax/mysql.vim
===================================================================
--- vim/runtime/syntax/mysql.vim.orig
+++ vim/runtime/syntax/mysql.vim
@@ -67,7 +67,7 @@
 " Comments (c-style, mysql-style and modified sql-style)
 syn region mysqlComment		 start="/\*"  end="\*/"
 syn match mysqlComment		 "#.*"
-syn match mysqlComment		 "-- .*"
+syn match mysqlComment		 "--\_s.*"
 syn sync ccomment mysqlComment
 
 " Column types