diff --git a/share/man/man9/random_harvest.9 b/share/man/man9/random_harvest.9
index 200605dda4cc..7b72f3e996da 100644
--- a/share/man/man9/random_harvest.9
+++ b/share/man/man9/random_harvest.9
@@ -32,6 +32,7 @@
 .Nm random_harvest
 .Nd gather entropy from the kernel for the entropy device
 .Sh SYNOPSIS
+.In sys/types.h
 .In sys/random.h
 .Ft void
 .Fo random_harvest
diff --git a/share/man/man9/rijndael.9 b/share/man/man9/rijndael.9
index c6289f173907..6ff5338ba525 100644
--- a/share/man/man9/rijndael.9
+++ b/share/man/man9/rijndael.9
@@ -38,6 +38,7 @@
 .Nm rijndael_padDecrypt
 .Nd AES encryption
 .Sh SYNOPSIS
+.In sys/types.h
 .In crypto/rijndael/rijndael.h
 .Ft int
 .Fo rijndael_makeKey