diff --git a/.github/workflows/check_classic_mac_basic.yml b/.github/workflows/check_classic_mac_basic.yml
index 3b0b0d01..e9cd59ad 100644
--- a/.github/workflows/check_classic_mac_basic.yml
+++ b/.github/workflows/check_classic_mac_basic.yml
@@ -17,6 +17,7 @@ jobs:
         brew install automake
         brew install openssl
         brew install popt
+        brew install libconfig
 
     - name: Set Equates
       run: |