diff --git a/src/libraries/System.IO.Compression/ref/System.IO.Compression.cs b/src/libraries/System.IO.Compression/ref/System.IO.Compression.cs
index fbea7ccd916a70..65ccf2264fc8ce 100644
--- a/src/libraries/System.IO.Compression/ref/System.IO.Compression.cs
+++ b/src/libraries/System.IO.Compression/ref/System.IO.Compression.cs
@@ -7,17 +7,17 @@
 
 namespace System.IO.Compression
 {
+    public enum CompressionMode
+    {
+        Decompress = 0,
+        Compress = 1,
+    }
     public enum CompressionLevel
     {
         Optimal = 0,
         Fastest = 1,
         NoCompression = 2,
     }
-    public enum CompressionMode
-    {
-        Decompress = 0,
-        Compress = 1,
-    }
     public partial class DeflateStream : System.IO.Stream
     {
         public DeflateStream(System.IO.Stream stream, System.IO.Compression.CompressionLevel compressionLevel) { }