diff --git a/.github/workflows/ios_sentry_upload_pr.yml b/.github/workflows/ios_sentry_upload_pr.yml
index 46c50e5c..845a75af 100644
--- a/.github/workflows/ios_sentry_upload_pr.yml
+++ b/.github/workflows/ios_sentry_upload_pr.yml
@@ -2,7 +2,6 @@ name: Sentry PR iOS Upload (Size Analysis)
 
 on:
   pull_request:
-    branches: [main]
     paths: [ios/**, .github/workflows/ios_sentry_upload_pr.yml]
 
 jobs:
@@ -30,5 +29,16 @@ jobs:
         run: |
           set -e -o pipefail
           BASE_REF="origin/${{ github.base_ref }}"
-          BASE_SHA=$(git merge-base "$BASE_REF" HEAD 2>/dev/null)
+          if [[ "${{ github.base_ref }}" == "$DEFAULT" ]]; then
+            # Normal PR
+            BASE_SHA="$(git merge-base "$BASE_REF" HEAD 2>/dev/null || git merge-base HEAD "$BASE_REF")"
+          else
+            # Stacked PR
+            BASE_SHA="$(git rev-parse "$BASE_REF")"
+          fi
           echo "BASE_SHA=$BASE_SHA"
+
+      - name: Fork
+        shell: bash
+        run: |
+          echo "test"