diff --git a/.github/workflows/build-documentation.yml b/.github/workflows/build-documentation.yml
index 7403116..05f16f2 100644
--- a/.github/workflows/build-documentation.yml
+++ b/.github/workflows/build-documentation.yml
@@ -14,5 +14,5 @@ jobs:
     - uses: ammaraskar/sphinx-action@master
       with:
         docs-folder: "docs/"
-        pre_build-command: "cmake -S . -B build -DBUILD_DOCUMENTATION=ON -DBUILD_TESTING=OFF"
+        pre-build-command: "cmake -S . -B build -DBUILD_DOCUMENTATION=ON -DBUILD_TESTING=OFF"
         build-command: "cmake --build build --target Sphinx-libmcfp"