diff --git a/share/man/man9/disk.9 b/share/man/man9/disk.9
index 16d2b3a24217..ce4caeb127dd 100644
--- a/share/man/man9/disk.9
+++ b/share/man/man9/disk.9
@@ -34,7 +34,7 @@
 .Nm disk
 .Nd Kernel disk storage API
 .Sh SYNOPSIS
-.In sys/geom_disk.h
+.In geom/geom_disk.h
 .Ft void
 .Fo disk_create
 .Fa "int unit"