diff --git a/man3/printf.3 b/man3/printf.3
index fcc3bd6f3..4fa1f11f3 100644
--- a/man3/printf.3
+++ b/man3/printf.3
@@ -115,7 +115,7 @@ is the same as
 except that it outputs to a file descriptor,
 .IR fd ,
 instead of to a
-.I stdio
+.BR stdio (3)
 stream.
 .PP
 The functions