diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6e2e0bf..04eaa59 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -125,6 +125,7 @@ jobs:
       - uses: ankane/setup-postgres-valgrind@v1
         with:
           postgres-version: 16
+          check-ub: yes
       - run: make OPTFLAGS=""
       - run: sudo --preserve-env=PG_CONFIG make install
       - run: make installcheck