diff --git a/ArcFormats/CommonStreams.cs b/ArcFormats/CommonStreams.cs
index 57f094ba..fa0547bf 100644
--- a/ArcFormats/CommonStreams.cs
+++ b/ArcFormats/CommonStreams.cs
@@ -249,6 +249,50 @@ namespace GameRes.Formats
         }
     }
 
+    /// <summary>
+    /// Limits underlying stream to the first N bytes.
+    /// </summary>
+    public class LimitStream : InputProxyStream
+    {
+        bool    m_can_seek;
+        long    m_position;
+        long    m_last;
+
+        public LimitStream (Stream input, long last, bool leave_open = false) : base (input, leave_open)
+        {
+            m_can_seek = input.CanSeek;
+            m_position = 0;
+            m_last = last;
+        }
+
+        public override bool CanSeek  { get { return m_can_seek; } }
+        public override long Length   { get { return m_last; } }
+
+        public override int Read (byte[] buffer, int offset, int count)
+        {
+            if (m_can_seek)
+                m_position = Position;
+            if (m_position >= m_last)
+                return 0;
+            count = (int)Math.Min (count, m_last - m_position);
+            int read = BaseStream.Read (buffer, offset, count);
+            m_position += read;
+            return read;
+        }
+
+        public override int ReadByte ()
+        {
+            if (m_can_seek)
+                m_position = Position;
+            if (m_position >= m_last)
+                return -1;
+            int b = BaseStream.ReadByte();
+            if (-1 != b)
+                ++m_position;
+            return b;
+        }
+    }
+
     /// <summary>
     /// Lazily evaluated wrapper around non-seekable stream.
     /// </summary>
diff --git a/ArcFormats/Primel/Compression.cs b/ArcFormats/Primel/Compression.cs
index 48f48b6e..033dc7a9 100644
--- a/ArcFormats/Primel/Compression.cs
+++ b/ArcFormats/Primel/Compression.cs
@@ -354,45 +354,4 @@ namespace GameRes.Formats.Primel
             }
         }
     }
-
-    internal class LimitStream : InputProxyStream
-    {
-        bool    m_can_seek;
-        long    m_position;
-        long    m_last;
-
-        public LimitStream (Stream input, long last, bool leave_open = false) : base (input, leave_open)
-        {
-            m_can_seek = input.CanSeek;
-            m_position = 0;
-            m_last = last;
-        }
-
-        public override bool CanSeek  { get { return m_can_seek; } }
-        public override long Length   { get { return m_last; } }
-
-        public override int Read (byte[] buffer, int offset, int count)
-        {
-            if (m_can_seek)
-                m_position = Position;
-            if (m_position >= m_last)
-                return 0;
-            count = (int)Math.Min (count, m_last - m_position);
-            int read = BaseStream.Read (buffer, offset, count);
-            m_position += read;
-            return read;
-        }
-
-        public override int ReadByte ()
-        {
-            if (m_can_seek)
-                m_position = Position;
-            if (m_position >= m_last)
-                return -1;
-            int b = BaseStream.ReadByte();
-            if (-1 != b)
-                ++m_position;
-            return b;
-        }
-    }
 }