diff --git a/lib/libc/sys/brk.2 b/lib/libc/sys/brk.2
index dfc31fb0bba1..313e47d3fc86 100644
--- a/lib/libc/sys/brk.2
+++ b/lib/libc/sys/brk.2
@@ -39,8 +39,8 @@
 .Nm sbrk
 .Nd change data segment size
 .Sh SYNOPSIS
-.Fd #include <sys/unistd.h>
-.Ft int
+.Fd #include <unistd.h>
+.Ft char *
 .Fn brk "const char *addr"
 .Ft char *
 .Fn sbrk "int incr"