diff --git a/docs/julia.rst b/docs/julia.rst
index 98b19662b..d9b92b240 100644
--- a/docs/julia.rst
+++ b/docs/julia.rst
@@ -366,6 +366,12 @@ The following functions must be available:
 +---------------------------------------------------------------------------------------------------------------+
 | discardu256(unused:u256)                    | discard value                                                   |
 +---------------------------------------------------------------------------------------------------------------+
+| splitu256tou64(x:u256) -> (x1:u64, x2:u64,  | split u256 to four u64's                                        |
+|                            x3:u64, x4:u64)  |                                                                 |
++---------------------------------------------------------------------------------------------------------------+
+| combineu64tou256(x1:u64, x2:u64, x3:u64,    | combine four u64's into a single u256                           |
+|                  x4:u64) -> (x:u256)        |                                                                 |
++---------------------------------------------------------------------------------------------------------------+
 | sha3(p:u256, s:u256) -> v:u256              | keccak(mem[p...(p+s)))                                          |
 +---------------------------------------------------------------------------------------------------------------+