diff --git a/doc/10-icinga-template-library.md b/doc/10-icinga-template-library.md
index cf9a2ed05..249ad28aa 100644
--- a/doc/10-icinga-template-library.md
+++ b/doc/10-icinga-template-library.md
@@ -656,7 +656,7 @@ http_method                      | **Optional.** Set http method (for example: H
 http_maxage                      | **Optional.** Warn if document is more than seconds old.
 http_contenttype                 | **Optional.** Specify Content-Type header when POSTing.
 http_useragent                   | **Optional.** String to be sent in http header as User Agent.
-http_header                      | **Optional.** Any other tags to be sent in http header.
+http_header                      | **Optional.** Any other tags to be sent in http header. Can be an array if multiple headers should be passed to `check_http`.
 http_extendedperfdata            | **Optional.** Print additional perfdata. Defaults to false.
 http_onredirect                  | **Optional.** How to handle redirect pages. Possible values: "ok" (default), "warning", "critical", "follow", "sticky" (like follow but stick to address), "stickyport" (like sticky but also to port)
 http_pagesize                    | **Optional.** Minimum page size required:Maximum page size required.
diff --git a/itl/command-plugins.conf b/itl/command-plugins.conf
index 14501474a..e3b422f1b 100644
--- a/itl/command-plugins.conf
+++ b/itl/command-plugins.conf
@@ -502,7 +502,7 @@ object CheckCommand "http" {
 		}
 		"-k" = {
 			value = "$http_header$"
-			description = "Any other tags to be sent in http header"
+			description = "Any other tags to be sent in http header (may be repeated)"
 		}
 		"-E" = {
 			set_if = "$http_extendedperfdata$"