diff --git a/stdlib/public/core/Algorithm.swift b/stdlib/public/core/Algorithm.swift
index a3fe61253d54a..2b8ca062737a5 100644
--- a/stdlib/public/core/Algorithm.swift
+++ b/stdlib/public/core/Algorithm.swift
@@ -168,7 +168,9 @@ public struct EnumerateGenerator<
   /// - Requires: No preceding call to `self.next()` has returned `nil`.
   public mutating func next() -> Element? {
     guard let b = base.next() else { return nil }
-    return (index: count++, element: b)
+    let element = (index: count, element: b)
+    count += 1
+    return element
   }
 }