diff --git a/pkgs/development/python-modules/sphinxcontrib-websupport/default.nix b/pkgs/development/python-modules/sphinxcontrib-websupport/default.nix
index 5624cb99157..45027ba15c4 100644
--- a/pkgs/development/python-modules/sphinxcontrib-websupport/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-websupport/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, sphinxcontrib-serializinghtml
 , six
 }:
 
@@ -13,7 +14,7 @@ buildPythonPackage rec {
     sha256 = "4edf0223a0685a7c485ae5a156b6f529ba1ee481a1417817935b20bde1956232";
   };
 
-  propagatedBuildInputs = [ six ];
+  propagatedBuildInputs = [ six sphinxcontrib-serializinghtml ];
 
   doCheck = false;