diff --git a/actix-http/src/header/map.rs b/actix-http/src/header/map.rs
index 3a500a70c..67292101f 100644
--- a/actix-http/src/header/map.rs
+++ b/actix-http/src/header/map.rs
@@ -646,7 +646,7 @@ impl From<http::HeaderMap> for HeaderMap {
 /// Convert our 'HeaderMap' to 'http::HeaderMap'.
 impl From<HeaderMap> for http::HeaderMap {
     fn from(map: HeaderMap) -> Self {
-        Self::from_iter(map.into_iter())
+        Self::from_iter(map)
     }
 }