diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index a06ce8ac3c5a..ef26a82b4b95 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -364,7 +364,7 @@ let
     pname = "AnyEvent-HTTP";
     version = "2.25";
     src = fetchurl {
-      url = mirror://cpan/authors/id/M/ML/MLEHMANN/AnyEvent-HTTP-2.25.tar.gz;
+      url = "mirror://cpan/authors/id/M/ML/MLEHMANN/AnyEvent-HTTP-2.25.tar.gz";
       sha256 = "5cfa53416124176f6f4cd32b00ea8ca79a2d5df51258683989cd04fe86e25013";
     };
     propagatedBuildInputs = [ AnyEvent commonsense ];