diff --git a/Formula/gz-common6.rb b/Formula/gz-common6.rb
index c517f3ced..dac3f43b7 100644
--- a/Formula/gz-common6.rb
+++ b/Formula/gz-common6.rb
@@ -18,6 +18,7 @@ class GzCommon6 < Formula
   depends_on macos: :high_sierra # c++17
   depends_on "ossp-uuid"
   depends_on "pkg-config"
+  depends_on "spdlog"
   depends_on "tinyxml2"
 
   def install