diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 06567e0f..60d3da5e 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -186,7 +186,7 @@ jobs:
       - name: autoconf
         run: autoreconf -fvi
       - name: configure
-        run: CFLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all  -fno-omit-frame-pointer -O2" CC=clang ./configure --with-crypto-library=${{matrix.ssllib}}
+        run: CFLAGS="-fsanitize=address,undefined -fno-sanitize-recover=all  -fno-omit-frame-pointer -O2" CC=clang ./configure --with-crypto-library=${{matrix.ssllib}} --enable-werror
       - name: make all
         run: make -j3
       - name: make check
@@ -355,7 +355,7 @@ jobs:
       - name: autoconf
         run: autoreconf -fvi
       - name: configure
-        run: ./configure --with-crypto-library=openssl ${{matrix.configureflags}}
+        run: ./configure --with-crypto-library=openssl ${{matrix.configureflags}} --enable-werror
       - name: make all
         run: make -j3
       - name: make check