diff --git a/include/wx/filesys.h b/include/wx/filesys.h
index cd2af3bbeb..00214c18af 100644
--- a/include/wx/filesys.h
+++ b/include/wx/filesys.h
@@ -168,7 +168,8 @@ protected:
 //--------------------------------------------------------------------------------
 
 // Open Bit Flags
-enum {
+enum wxFileSystemOpenFlags
+{
     wxFS_READ = 1,      // Open for reading
     wxFS_SEEKABLE = 4   // Returned stream will be seekable
 };