diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 858b56378..d4d93f156 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -62,7 +62,7 @@ jobs:
         run: |
            eval $(opam env)
            python3 mk_api_doc.py --mld --output-dir=api --z3py-package-path=../build-x64/python/z3 --build=../build-x64
-           python3 mk_params_doc.py 
+           Z3BUILD=build-x64 python3 mk_params_doc.py 
            mkdir api/html/ml
            ocamldoc -html -d api/html/ml -sort -hide Z3 -I $( ocamlfind query zarith ) -I ../build-x64/api/ml ../build-x64/api/ml/z3enums.mli ../build-x64/api/ml/z3.mli