diff --git a/src/Squirrel/BinaryPatchUtility.cs b/src/Squirrel/BinaryPatchUtility.cs
index b1eda7ec8..d25c0bc04 100644
--- a/src/Squirrel/BinaryPatchUtility.cs
+++ b/src/Squirrel/BinaryPatchUtility.cs
@@ -230,10 +230,13 @@ 0   32  Header
             WriteInt64(controlEndPosition - startPosition - c_headerSize, header, 8);
 
             // write compressed diff data
-            using (WrappingStream wrappingStream = new WrappingStream(output, Ownership.None))
-            using (var bz2Stream = new BZip2Stream(wrappingStream, CompressionMode.Compress))
+            if (dblen > 0)
             {
-                bz2Stream.Write(db, 0, dblen);
+                using (WrappingStream wrappingStream = new WrappingStream(output, Ownership.None))
+                using (var bz2Stream = new BZip2Stream(wrappingStream, CompressionMode.Compress))
+                {
+                    bz2Stream.Write(db, 0, dblen);
+                }
             }
 
             // compute size of compressed diff data
@@ -241,10 +244,13 @@ 0   32  Header
             WriteInt64(diffEndPosition - controlEndPosition, header, 16);
 
             // write compressed extra data
-            using (WrappingStream wrappingStream = new WrappingStream(output, Ownership.None))
-            using (var bz2Stream = new BZip2Stream(wrappingStream, CompressionMode.Compress))
+            if (eblen > 0)
             {
-                bz2Stream.Write(eb, 0, eblen);
+                using (WrappingStream wrappingStream = new WrappingStream(output, Ownership.None))
+                using (var bz2Stream = new BZip2Stream(wrappingStream, CompressionMode.Compress))
+                {
+                    bz2Stream.Write(eb, 0, eblen);
+                }
             }
 
             // seek to the beginning, write the header, then seek back to end