diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 843be6f100..01944fd0a8 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -73,4 +73,4 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Compile docs
-      run: RUSTDOCFLAGS=-Dwarnings cargo doc
+      run: RUSTDOCFLAGS="-D warnings" cargo doc