diff --git a/feat-core.opam b/feat-core.opam
index 833a2fdaf22275e5d849d6088e0cc56a9e9346ef..628243ae0f75d913e2fad91e9fecf5e1dd7be7c0 100644
--- a/feat-core.opam
+++ b/feat-core.opam
@@ -1,5 +1,6 @@
 name: "feat-core"
 opam-version: "2.0"
+license: "MIT"
 maintainer: "francois.pottier@inria.fr"
 authors: [
   "François Pottier <francois.pottier@inria.fr>"
diff --git a/feat-num.opam b/feat-num.opam
index 15316c13301391df495c72032d36e3a1112283e5..f134fd81d9db2ff46c45c30bd235bb7e5d690fea 100644
--- a/feat-num.opam
+++ b/feat-num.opam
@@ -1,5 +1,6 @@
 name: "feat-num"
 opam-version: "2.0"
+license: "MIT"
 maintainer: "francois.pottier@inria.fr"
 authors: [
   "François Pottier <francois.pottier@inria.fr>"
diff --git a/feat.opam b/feat.opam
index 3d020f2fec08604a1f9868643dd185bc5ed9161e..e143e498b3c27eefd4ba34d1b6c7871629665388 100644
--- a/feat.opam
+++ b/feat.opam
@@ -1,5 +1,6 @@
 name: "feat"
 opam-version: "2.0"
+license: "MIT"
 maintainer: "francois.pottier@inria.fr"
 authors: [
   "François Pottier <francois.pottier@inria.fr>"