diff --git a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpHeaders.cs b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpHeaders.cs
index ff79d8394d707b..ab0df44d9d566d 100644
--- a/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpHeaders.cs
+++ b/src/libraries/System.Net.Http/src/System/Net/Http/Headers/HttpHeaders.cs
@@ -1435,7 +1435,7 @@ private ref object GetValueRefOrNullRef(HeaderDescriptor key)
             }
             else if (store is not null)
             {
-                valueRef = ref CollectionsMarshal.GetValueRefOrNullRef(Unsafe.As<Dictionary<HeaderDescriptor, object>>(store), key);
+                valueRef = ref CollectionsMarshal.GetValueRefOrNullRef((Dictionary<HeaderDescriptor, object>)store, key);
             }
 
             return ref valueRef;
@@ -1580,7 +1580,7 @@ internal bool Remove(HeaderDescriptor key)
             }
             else if (store is not null)
             {
-                removed = Unsafe.As<Dictionary<HeaderDescriptor, object>>(store).Remove(key);
+                removed = ((Dictionary<HeaderDescriptor, object>)store).Remove(key);
             }
 
             if (removed)