3 files changed, 5 insertions, 0 deletions
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index c38edb5f92..512cfc4e58 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -8397,6 +8397,7 @@ synIDattr({synID}, {what} [, {mode}])			*synIDattr()*
 		"standout"	"1" if standout
 		"underline"	"1" if underlined
 		"undercurl"	"1" if undercurled
+		"strikethrough"	"1" if struckthrough
 
 		Example (echoes the color of the syntax item under the
 		cursor): >
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index a027f66a3f..0a4257e2b2 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -4720,6 +4720,7 @@ the same syntax file on all UIs.
 
 					*bold* *underline* *undercurl*
 					*inverse* *italic* *standout*
+					*strikethrough*
 cterm={attr-list}			*attr-list* *highlight-cterm* *E418*
 	attr-list is a comma separated list (without spaces) of the
 	following items (in any order):
@@ -4730,6 +4731,7 @@ cterm={attr-list}			*attr-list* *highlight-cterm* *E418*
 		inverse		same as reverse
 		italic
 		standout
+		strikethrough
 		NONE		no attributes used (used to reset it)
 
 	Note that "bold" can be used here and by using a bold font.  They
diff --git a/runtime/doc/ui.txt b/runtime/doc/ui.txt
index 872049b356..a2f19593ae 100644
--- a/runtime/doc/ui.txt
+++ b/runtime/doc/ui.txt
@@ -290,6 +290,7 @@ numerical highlight ids to the actual attributes.
 			switched.
 	`italic`:	italic text.
 	`bold`:		bold text.
+	`strikethrough`:  struckthrough text.
 	`underline`:	underlined text. The line has `special` color.
 	`undercurl`:	undercurled text. The curl has `special` color.
 	`blend`:	Blend level (0-100). Could be used by UIs to support
@@ -447,6 +448,7 @@ is not active. New UIs should implement |ui-linegrid| instead.
 			switched.
 	`italic`:	italic text.
 	`bold`:		bold text.
+	`strikethrough`:  struckthrough text.
 	`underline`:	underlined text. The line has `special` color.
 	`undercurl`:	undercurled text. The curl has `special` color.