diff --git a/docs/_rpc/ns-debug.md b/docs/_rpc/ns-debug.md
index 57640283d0..2fd2d9f79f 100644
--- a/docs/_rpc/ns-debug.md
+++ b/docs/_rpc/ns-debug.md
@@ -753,7 +753,7 @@ Specifying the `tracer` option in the second argument enables JavaScript-based t
 `log` has the following fields:
 
  - `op`: Object, an OpCode object representing the current opcode
- - `stack`: array[big.Int], the EVM execution stack
+ - `stack`: Object, a structure representing the EVM execution stack
  - `memory`: Object, a structure representing the contract's memory space
  - `contract`: Object, an object representing the account executing the current operation