diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index e5516e03e0f..b4e430755d5 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -48,6 +48,7 @@ MAN=	aac.4 \
 	fxp.4 \
 	geom.4 \
 	gif.4 \
+	gre.4 \
 	gusc.4 \
 	gx.4 \
 	ichsmb.4 \