diff --git a/pkgs/development/python-modules/onepassword-sdk/default.nix b/pkgs/development/python-modules/onepassword-sdk/default.nix
index 9b2538dd873df..74d3471bbd5d1 100644
--- a/pkgs/development/python-modules/onepassword-sdk/default.nix
+++ b/pkgs/development/python-modules/onepassword-sdk/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  fetchpatch,
 
   # build-system
   setuptools,
@@ -22,6 +23,15 @@ buildPythonPackage (finalAttrs: {
     hash = "sha256-mMmHC5zBY1w+Y+NAZJkP7m1CqErwCv2bMNAo1TTNm6E=";
   };
 
+  patches = [
+    # Add PEP 561 py.typed marker; remove when upstreamed in next release.
+    # https://github.com/1Password/onepassword-sdk-python/issues/220
+    (fetchpatch {
+      url = "https://github.com/1Password/onepassword-sdk-python/commit/42c0e2e9e4af861174f70b73ef4bfa138e6a3834.patch";
+      hash = "sha256-twSwe6ShQH0sWxIlzWGuz+dKr+bb4cNVvFKfPHBg2rw=";
+    })
+  ];
+
   build-system = [
     setuptools
   ];