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-rw-r--r--docs/units-and-global-variables.rst4
1 files changed, 2 insertions, 2 deletions
diff --git a/docs/units-and-global-variables.rst b/docs/units-and-global-variables.rst
index ce58cf56..8f49c600 100644
--- a/docs/units-and-global-variables.rst
+++ b/docs/units-and-global-variables.rst
@@ -107,9 +107,9 @@ Mathematical and Cryptographic Functions
----------------------------------------
``addmod(uint x, uint y, uint k) returns (uint)``:
- compute ``(x + y) % k`` where the addition is performed with arbitrary precision and does not wrap around at ``2**256``.
+ compute ``(x + y) % k`` where the addition is performed with arbitrary precision and does not wrap around at ``2**256``. Assert that ``k != 0`` starting from version 0.5.0.
``mulmod(uint x, uint y, uint k) returns (uint)``:
- compute ``(x * y) % k`` where the multiplication is performed with arbitrary precision and does not wrap around at ``2**256``.
+ compute ``(x * y) % k`` where the multiplication is performed with arbitrary precision and does not wrap around at ``2**256``. Assert that ``k != 0`` starting from version 0.5.0.
``keccak256(...) returns (bytes32)``:
compute the Ethereum-SHA-3 (Keccak-256) hash of the :ref:`(tightly packed) arguments <abi_packed_mode>`
``sha256(...) returns (bytes32)``: