diff --git a/runtime/syntax/javascript.vim b/runtime/syntax/javascript.vim
index 9589b19..a95ecac 100644
--- a/runtime/syntax/javascript.vim
+++ b/runtime/syntax/javascript.vim
@@ -9,6 +9,7 @@
 "		(ss) additional factoring of keywords, globals, and members
 " Last Change:	2012 Oct 05
 " 		2013 Jun 12: adjusted javaScriptRegexpString (Kevin Locke)
+" 		2018 Apr 14: adjusted javaScriptRegexpString (LongJohnCoder)
 
 " tuning parameters:
 " unlet javaScript_fold
@@ -37,7 +38,7 @@
 
 syn match   javaScriptSpecialCharacter "'\\.'"
 syn match   javaScriptNumber	       "-\=\<\d\+L\=\>\|0[xX][0-9a-fA-F]\+\>"
-syn region  javaScriptRegexpString     start=+/[^/*]+me=e-1 skip=+\\\\\|\\/+ end=+/[gim]\{0,2\}\s*$+ end=+/[gim]\{0,2\}\s*[;.,)\]}]+me=e-1 contains=@htmlPreproc oneline
+syn region  javaScriptRegexpString     start=+/[^/*]+me=e-1 skip=+\\\\\|\\/+ end=+/[gimuys]\{0,2\}\s*$+ end=+/[gimuys]\{0,2\}\s*[;.,)\]}]+me=e-1 contains=@htmlPreproc oneline
 
 syn keyword javaScriptConditional	if else switch
 syn keyword javaScriptRepeat		while for do in