diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index df5c888..25b0f4c 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -401,7 +401,7 @@
 " Let: {{{2
 " ===
 syn keyword	vimLet	let	unl[et]	skipwhite nextgroup=vimVar,vimFuncVar,vimLetHereDoc
-VimFoldh syn region vimLetHereDoc	matchgroup=vimLetHereDocStart start='=<<\s\+\%(trim\|eval\>\)\=\s*\z(\L\S*\)'	matchgroup=vimLetHereDocStop end='^\s*\z1\s*$'
+VimFoldh syn region vimLetHereDoc	matchgroup=vimLetHereDocStart start='=<<\s\+\%(trim\s\+\)\=\%(eval\s\+\)\=\z(\L\S*\)'	matchgroup=vimLetHereDocStop end='^\s*\z1\s*$'
 
 " Abbreviations: {{{2
 " =============