1 files changed, 1 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/applications/science/math/perseus/default.nix b/nixpkgs/pkgs/applications/science/math/perseus/default.nix
index 2d150d0c30e9..55293e6c8a79 100644
--- a/nixpkgs/pkgs/applications/science/math/perseus/default.nix
+++ b/nixpkgs/pkgs/applications/science/math/perseus/default.nix
@@ -32,7 +32,7 @@ stdenv.mkDerivation {
       around datasets arising from point samples, images, distance
       matrices and so forth.
     '';
-    homepage = http://www.sas.upenn.edu/~vnanda/perseus/index.html;
+    homepage = "http://www.sas.upenn.edu/~vnanda/perseus/index.html";
     license = stdenv.lib.licenses.gpl3;
     maintainers = with stdenv.lib.maintainers; [erikryb];
     platforms = stdenv.lib.platforms.linux;