1 files changed, 1 insertions, 1 deletions
diff --git a/mdoc.7 b/mdoc.7
index ddd8db66..5bc5f736 100644
--- a/mdoc.7
+++ b/mdoc.7
@@ -2872,7 +2872,7 @@ The
 language first appeared as a troff macro package in
 .Bx 4.4 .
 It was later significantly updated by Werner Lemberg and Ruslan Ermilov
-in groff-1.20.1.
+in groff-1.17.
 The standalone implementation that is part of the
 .Xr mandoc 1
 utility written by Kristaps Dzonsons appeared in