diff --git a/pkgs/applications/science/biology/hmmer/default.nix b/pkgs/applications/science/biology/hmmer/default.nix
index 0f83178626bf..2a4df9d21dba 100644
--- a/pkgs/applications/science/biology/hmmer/default.nix
+++ b/pkgs/applications/science/biology/hmmer/default.nix
@@ -20,6 +20,7 @@ stdenv.mkDerivation rec {
     homepage = "http://hmmer.org/";
     license = licenses.gpl3;
     maintainers = [ maintainers.iimog ];
-    platforms = platforms.unix;
+    # at least SSE is *required*
+    platforms = platforms.x86_64;
   };
 }