diff --git a/GameRes/ArcFile.cs b/GameRes/ArcFile.cs
index 80957ac8..59633b79 100644
--- a/GameRes/ArcFile.cs
+++ b/GameRes/ArcFile.cs
@@ -143,6 +143,22 @@ namespace GameRes
             return m_interface.OpenEntry (this, entry);
         }
 
+        /// <summary>
+        /// Open specified <paramref name="entry"/> as a seekable Stream.
+        /// </summary>
+        public Stream OpenSeekableEntry (Entry entry)
+        {
+            var input = OpenEntry (entry);
+            if (input.CanSeek)
+                return input;
+            using (input)
+            {
+                var copy = new MemoryStream ((int)entry.Size);
+                input.CopyTo (copy);
+                return copy;
+            }
+        }
+
         /// <summary>
         /// Create file corresponding to <paramref name="entry"/> within current directory and open
         /// it for writing.