diff --git a/pkgs/development/libraries/wolfssl/default.nix b/pkgs/development/libraries/wolfssl/default.nix
index 30291a18022..8f57a0bf1b7 100644
--- a/pkgs/development/libraries/wolfssl/default.nix
+++ b/pkgs/development/libraries/wolfssl/default.nix
@@ -29,6 +29,7 @@ stdenv.mkDerivation rec {
     description = "A small, fast, portable implementation of TLS/SSL for embedded devices";
     homepage    = "https://www.wolfssl.com/";
     platforms   = platforms.all;
+    license = stdenv.lib.licenses.gpl2;
     maintainers = with maintainers; [ mcmtroffaes ];
   };
 }