diff --git a/.ci/build-mac.sh b/.ci/build-mac.sh
index 300f69cb06..f386866264 100755
--- a/.ci/build-mac.sh
+++ b/.ci/build-mac.sh
@@ -122,6 +122,7 @@ cmake .. \
     -DUSE_SYSTEM_MVK=ON \
     -DUSE_SYSTEM_SDL=ON \
     -DUSE_SYSTEM_OPENCV=ON \
+    -DUSE_SYSTEM_PROTOBUF=ON \
     -G Ninja
 fi