diff --git a/exercises/practice/armstrong-numbers/.meta/Sources/ArmstrongNumbers/ArmstrongNumbersExample.swift b/exercises/practice/armstrong-numbers/.meta/Sources/ArmstrongNumbers/ArmstrongNumbersExample.swift
index 1637e6610..df0d8576a 100644
--- a/exercises/practice/armstrong-numbers/.meta/Sources/ArmstrongNumbers/ArmstrongNumbersExample.swift
+++ b/exercises/practice/armstrong-numbers/.meta/Sources/ArmstrongNumbers/ArmstrongNumbersExample.swift
@@ -3,6 +3,6 @@ import Foundation
 func isArmstrongNumber(_ number: Int) -> Bool {
     let stringNumber = String(number)
     let numberLength = stringNumber.count
-    let sum: Int = stringNumber.compactMap { Int(String($0)) }.reduce(0) { $0 + Int(pow(Double($1), Double(numberLength))) }
+    let sum = stringNumber.compactMap { Int(String($0)) }.reduce(0) { $0 + Int(pow(Double($1), Double(numberLength))) }
     return sum == number
 }
diff --git a/exercises/practice/armstrong-numbers/Sources/ArmstrongNumbers/ArmstrongNumbers.swift b/exercises/practice/armstrong-numbers/Sources/ArmstrongNumbers/ArmstrongNumbers.swift
index 765387f1f..63b122561 100644
--- a/exercises/practice/armstrong-numbers/Sources/ArmstrongNumbers/ArmstrongNumbers.swift
+++ b/exercises/practice/armstrong-numbers/Sources/ArmstrongNumbers/ArmstrongNumbers.swift
@@ -1,3 +1,3 @@
-func isArmstrongNumber(_ number: Int128) -> Bool {
+func isArmstrongNumber(_ number: Int) -> Bool {
     // Write your code for the 'Armstrong Numbers' exercise here.
 }