diff --git a/lib/libcompat/4.3/lsearch.3 b/lib/libcompat/4.3/lsearch.3
index d6abfca11592..ac0e6d594e0f 100644
--- a/lib/libcompat/4.3/lsearch.3
+++ b/lib/libcompat/4.3/lsearch.3
@@ -39,6 +39,7 @@
 .Nm lfind,
 .Nd linear searching routines
 .Sh SYNOPSIS
+.Fd #include <sys/types.h>
 .Ft char *
 .Fn lsearch "const void *key" "const void *base" "size_t *nelp" "size_t width" "int (*compar)(void *, void *)"
 .Ft char *