diff --git a/src/context/helper.rs b/src/context/helper.rs
index 4bfaa85..e3bc871 100644
--- a/src/context/helper.rs
+++ b/src/context/helper.rs
@@ -45,7 +45,7 @@ pub fn logarithm(arg: &Value) -> EvalResult {
 		Value::Tuple(tuple)
 			=>	{
 				let len = tuple.len();
-				if len != 2 { return Err(EvalexprError::WrongOperatorArgumentAmount { expected: 2, actual: len }) }
+				if len != 2 { return Err(EvalexprError::wrong_function_argument_amount_range(len, 1..=2)); }
 
 				let i_value = tuple.get(0).unwrap();
 				if		let Value::Float(float)	= i_value { value = float.clone(); }