diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b583da3..b527865 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,6 +45,7 @@ jobs:
       - name: Enable type layout randomization
         run: echo RUSTFLAGS=${RUSTFLAGS}\ -Zrandomize-layout >> $GITHUB_ENV
         if: startsWith(matrix.rust, 'nightly')
+        shell: bash
       - name: Ignore Windows linker warning
         run: echo RUSTFLAGS=${RUSTFLAGS}\ -Alinker_messages >> $GITHUB_ENV
         if: matrix.rust == 'nightly-x86_64-pc-windows-gnu'