diff --git a/usr.bin/nroff/ms.7 b/usr.bin/nroff/ms.7
index a9c84b0..4af2fbe 100644
--- a/usr.bin/nroff/ms.7
+++ b/usr.bin/nroff/ms.7
@@ -29,7 +29,7 @@ initialization, and the last two may be used even before initialization:
 	.na    no alignment of right margin
 
 .fi
-Font changes with \f are also allowed;
+Font changes with \\f are also allowed;
 for example, '\\fIword\\fR' will italicize word.
 .SH REQUESTS
 .nf