diff --git a/ArcFormats/Ethornell/AudioBGI.cs b/ArcFormats/Ethornell/AudioBGI.cs
index 04198339..c03c3153 100644
--- a/ArcFormats/Ethornell/AudioBGI.cs
+++ b/ArcFormats/Ethornell/AudioBGI.cs
@@ -49,9 +49,10 @@ namespace GameRes.Formats.BGI
             if (!Binary.AsciiEqual (header, 4, "bw  "))
                 return null;
             uint offset = LittleEndian.ToUInt32 (header, 0);
-            file.Seek (offset, SeekOrigin.Begin);
+            if (offset >= file.Length)
+                return null;
 
-            var input = new StreamRegion (file, file.Position);
+            var input = new StreamRegion (file, offset);
             return new OggInput (input);
             // input is left undisposed in case of exception.
         }
diff --git a/ArcFormats/Properties/AssemblyInfo.cs b/ArcFormats/Properties/AssemblyInfo.cs
index 7b160fd3..5f866893 100644
--- a/ArcFormats/Properties/AssemblyInfo.cs
+++ b/ArcFormats/Properties/AssemblyInfo.cs
@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion ("1.1.9.417")]
-[assembly: AssemblyFileVersion ("1.1.9.417")]
+[assembly: AssemblyVersion ("1.1.9.418")]
+[assembly: AssemblyFileVersion ("1.1.9.418")]