diff --git a/.github/workflows/check_classic_mac_basic.yml b/.github/workflows/check_classic_mac_basic.yml
index d76cca2c..7684b589 100644
--- a/.github/workflows/check_classic_mac_basic.yml
+++ b/.github/workflows/check_classic_mac_basic.yml
@@ -18,6 +18,7 @@ jobs:
         brew install openssl
         brew install popt
         brew install libconfig
+        brew install libao
 
     - name: Configure
       run: |