diff --git a/rc/filetype/sh.kak b/rc/filetype/sh.kak
index f942066d..35076d9c 100644
--- a/rc/filetype/sh.kak
+++ b/rc/filetype/sh.kak
@@ -24,7 +24,7 @@ add-highlighter shared/sh/double_string region  %{(?<!\\)(?:\\\\)*\K"} %{(?<!\\)
 add-highlighter shared/sh/single_string region %{(?<!\\)(?:\\\\)*\K'} %{'} fill string
 add-highlighter shared/sh/expansion region '\$\{' '\}|\n' fill value
 add-highlighter shared/sh/comment region '(?<!\$)(?<!\$\{)#' '$' fill comment
-add-highlighter shared/sh/heredoc region -match-capture '<<-?''?(\w+)''?' '^\t*(\w+)$' fill string
+add-highlighter shared/sh/heredoc region -match-capture '<<-?\h*''?(\w+)''?' '^\t*(\w+)$' fill string
 
 add-highlighter shared/sh/double_string/fill fill string