diff --git a/share/man/man4/tdfx.4 b/share/man/man4/tdfx.4
index fd8ba555a774..b9207e19e15d 100644
--- a/share/man/man4/tdfx.4
+++ b/share/man/man4/tdfx.4
@@ -2,7 +2,7 @@
 .\" $FreeBSD$
 .\"
 .Dd February 19, 2001
-.Dt 3DFX 4
+.Dt TDFX 4
 .Os
 .Sh NAME
 .Nm tdfx