diff --git a/LICENSE.MIT b/LICENSE.MIT
new file mode 100644
index 00000000..218a4e10
--- /dev/null
+++ b/LICENSE.MIT
@@ -0,0 +1,19 @@
+Copyright (c) 2012, The v86 contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/Readme.md b/Readme.md
index 45512699..51454edb 100644
--- a/Readme.md
+++ b/Readme.md
@@ -197,6 +197,7 @@ repository under their own licenses:
 - [`lib/zstd/zstddeclib.c`](lib/zstd/zstddeclib.c)
 - [`tests/kvm-unit-tests/`](tests/kvm-unit-tests)
 - [`tests/qemutests/`](tests/qemutests)
+- [`src/floppy.js/`](src/floppy.js) contains parts ported from qemu under the MIT license, see LICENSE.MIT.
 
 ## Credits
 
diff --git a/src/floppy.js b/src/floppy.js
index 7c69b61e..b29b1fbb 100644
--- a/src/floppy.js
+++ b/src/floppy.js
@@ -1,5 +1,7 @@
 // v86 Floppy Disk Controller emulation
 //
+// This file is licensed under both BSD and MIT, see LICENSE and LICENSE.MIT.
+//
 // Links
 // - Intel 82078 44 Pin CHMOS Single-Chip Floppy Disk Controller
 //   https://wiki.qemu.org/images/f/f0/29047403.pdf