diff --git a/rpcs3/Emu/FS/VFS.h b/rpcs3/Emu/FS/VFS.h
index 0f1f1539ba..8876072b3f 100644
--- a/rpcs3/Emu/FS/VFS.h
+++ b/rpcs3/Emu/FS/VFS.h
@@ -3,7 +3,7 @@
 class vfsDevice;
 struct vfsFileBase;
 class vfsDirBase;
-enum vfsOpenMode;
+enum vfsOpenMode : u8;
 
 enum vfsDeviceType
 {
diff --git a/rpcs3/Emu/FS/vfsFileBase.h b/rpcs3/Emu/FS/vfsFileBase.h
index a74e05e251..ff7a56e349 100644
--- a/rpcs3/Emu/FS/vfsFileBase.h
+++ b/rpcs3/Emu/FS/vfsFileBase.h
@@ -1,7 +1,7 @@
 #pragma once
 #include "vfsStream.h"
 
-enum vfsOpenMode
+enum vfsOpenMode : u8
 {
 	vfsRead = 0x1,
 	vfsWrite = 0x2,