diff --git a/pkgs/development/python-modules/beangulp/default.nix b/pkgs/development/python-modules/beangulp/default.nix
index 6299ca35159a..d051c0bc622b 100644
--- a/pkgs/development/python-modules/beangulp/default.nix
+++ b/pkgs/development/python-modules/beangulp/default.nix
@@ -6,6 +6,7 @@
   chardet,
   click,
   fetchFromGitHub,
+  fetchpatch2,
   lxml,
   petl,
   python-magic,
@@ -25,6 +26,13 @@ buildPythonPackage rec {
     hash = "sha256-h7xLHwEyS+tOI7v6Erp12VfVnxOf4930++zghhC3in4=";
   };
 
+  patches = [
+    (fetchpatch2 {
+      url = "https://github.com/beancount/beangulp/commit/254bfb38ffed049ef8f3041bfaf01b3f5a8aa771.patch?full_index=1";
+      hash = "sha256-ojysT23K0xmFafzTnRZiHkLS2ioDR/tVK02mfF7N9so=";
+    })
+  ];
+
   build-system = [ setuptools ];
 
   dependencies = [