diff --git a/pkgs/development/python-modules/PyLD/default.nix b/pkgs/development/python-modules/PyLD/default.nix
index 0862fa63072d..e6ee742ba45a 100644
--- a/pkgs/development/python-modules/PyLD/default.nix
+++ b/pkgs/development/python-modules/PyLD/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, buildPythonPackage, fetchFromGitHub, python, gnugrep }:
+{ stdenv, buildPythonPackage, fetchFromGitHub, fetchpatch, python, gnugrep }:
 
 let
 
@@ -29,6 +29,14 @@ buildPythonPackage {
     sha256 = "1bmpz4s6j7by6l45wwxy7dn7hmrhxc26kbx2hbfy41x29vbjg6j9";
   };
 
+  patches = [
+    # Fix tests on Python 3. Remove with the next release
+    (fetchpatch {
+      url = "https://github.com/digitalbazaar/pyld/commit/ec4bd907b7fbd566e1f6c76d09676e4900e3dcd0.patch";
+      sha256 = "0i5phs5qnq4bjsb72if1sbfg751qc14qbdskqn0xhlzx0r75l7za";
+    })
+  ];
+
   # Unfortunately PyLD does not pass all testcases in the JSON-LD corpus. We
   # check for at least a minimum amount of successful tests so we know it's not
   # getting worse, at least.