diff --git a/MetadataExtractor/IO/SequentialStreamReader.cs b/MetadataExtractor/IO/SequentialStreamReader.cs
index 4fdd1af8..fee9bb48 100644
--- a/MetadataExtractor/IO/SequentialStreamReader.cs
+++ b/MetadataExtractor/IO/SequentialStreamReader.cs
@@ -85,7 +85,7 @@ public override void Skip(long n)
             if (n < 0)
                 throw new ArgumentException("n must be zero or greater.");
 
-            if (_stream.Position + n > _stream.Length)
+            if ((ulong)(_stream.Position + n) > (ulong)(_stream.Length))
                 throw new IOException($"Unable to skip. Requested {n} bytes but only {_stream.Length - _stream.Position} remained.");
 
             _stream.Seek(n, SeekOrigin.Current);