diff --git a/pkgs/development/libraries/SDL_image/default.nix b/pkgs/development/libraries/SDL_image/default.nix
index 56701e80b1f..961a0a7f5aa 100644
--- a/pkgs/development/libraries/SDL_image/default.nix
+++ b/pkgs/development/libraries/SDL_image/default.nix
@@ -26,5 +26,6 @@ stdenv.mkDerivation rec {
     homepage    = "http://www.libsdl.org/projects/SDL_image/";
     maintainers = with maintainers; [ lovek323 ];
     platforms   = platforms.unix;
+    license     = licenses.zlib;
   };
 }