diff --git a/extra/sodium/ffi/ffi.factor b/extra/sodium/ffi/ffi.factor
index 39055bfc53..0ee57c9f5b 100644
--- a/extra/sodium/ffi/ffi.factor
+++ b/extra/sodium/ffi/ffi.factor
@@ -13,3 +13,9 @@ IN: sodium.ffi
 LIBRARY: sodium
 
 FUNCTION: int sodium_init ( )
+
+! randombytes_H
+FUNCTION: void randombytes_buf ( void* buf, size_t size )
+FUNCTION: uint32_t randombytes_random ( )
+FUNCTION: uint32_t randombytes_uniform ( uint32_t upper_bound )
+FUNCTION: void randombytes_stir ( )
diff --git a/extra/sodium/sodium.factor b/extra/sodium/sodium.factor
index 4f75f21c46..98df73f70a 100644
--- a/extra/sodium/sodium.factor
+++ b/extra/sodium/sodium.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2017 Alexander Ilin.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: init kernel math sodium.ffi ;
+USING: init kernel math sequences sodium.ffi ;
 IN: sodium
 
 ERROR: sodium-init-fail ;
@@ -8,4 +8,7 @@ ERROR: sodium-init-fail ;
 ! Call this before any other function, may be called multiple times.
 : sodium-init ( -- ) sodium_init 0 < [ sodium-init-fail ] when ;
 
+: random-bytes ( byte-array -- byte-array' )
+    dup dup length randombytes_buf ;
+
 [ sodium-init ] "sodium" add-startup-hook