diff --git a/.github/workflows/autobuild.yaml b/.github/workflows/autobuild.yaml
index 33ce352..824ae35 100644
--- a/.github/workflows/autobuild.yaml
+++ b/.github/workflows/autobuild.yaml
@@ -63,6 +63,10 @@ jobs:
             "-DCMAKE_C_COMPILER=clang"
             "-DCMAKE_CXX_COMPILER=clang++"
             "-DLLVM_ENABLE_ZLIB=FORCE_ON"
+            "-DCMAKE_OSX_ARCHITECTURES=x86_64;arm64"
+          # BoringSSL doesn't support universal binaries when building with ASM.
+          grpc_cmake: >-
+            "-DOPENSSL_NO_ASM=ON"
         - name: linux
           os: ubuntu-18.04
           preinstall: sudo apt-get install ninja-build libz-dev libc-ares-dev