diff --git a/.github/workflows/eg_regression.yml b/.github/workflows/eg_regression.yml
index 85e3927d001ea..0080870ede90f 100644
--- a/.github/workflows/eg_regression.yml
+++ b/.github/workflows/eg_regression.yml
@@ -39,6 +39,7 @@ jobs:
         with:
           repository: ${{ inputs.opentitan_repo || 'lowRISC/opentitan' }}
           ref: ${{ inputs.opentitan_ref || 'earlgrey_1.0.0' }}
+          fetch-depth: 0 # fetch all commits to avoid bug with bitstream rule
 
       - name: Prepare OpenTitan environment
         uses: ./.github/actions/prepare-env