diff --git a/lib/libc/db/man/Makefile.inc b/lib/libc/db/man/Makefile.inc
index f715e0161f7..f55b9f4eeb4 100644
--- a/lib/libc/db/man/Makefile.inc
+++ b/lib/libc/db/man/Makefile.inc
@@ -4,4 +4,5 @@
 
 # mpool.3
 MAN3+=	db/man/btree.3 db/man/dbopen.3 db/man/hash.3 db/man/recno.3
+MAN3+=	db/man/mpool.3
 MLINKS+= dbopen.3 db.3