diff --git a/pkgs/development/coq-modules/flocq/default.nix b/pkgs/development/coq-modules/flocq/default.nix
index c26c22b0a6dd..89555c2e13da 100644
--- a/pkgs/development/coq-modules/flocq/default.nix
+++ b/pkgs/development/coq-modules/flocq/default.nix
@@ -26,6 +26,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     homepage = http://flocq.gforge.inria.fr/;
     description = "Flocq (Floats for Coq) is a floating-point formalization for the Coq system";
+    license = licenses.lgpl3;
     maintainers = with maintainers; [ jwiegley ];
     platforms = coq.meta.platforms;
   };