diff --git a/configure.ac b/configure.ac
index d80875c376..9c42da5c82 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1127,6 +1127,7 @@ case $host in
         path_push_unique PKG_CONFIG_PATH /usr/local/opt/curl/lib/pkgconfig
         path_push_unique PKG_CONFIG_PATH /usr/local/opt/sqlite/lib/pkgconfig/
         path_push_unique PKG_CONFIG_PATH /usr/local/opt/ldns/lib/pkgconfig/
+        path_push_unique PKG_CONFIG_PATH /usr/local/opt/portaudio/lib/pkgconfig/
        ;;
 esac