diff --git a/BUILDING.md b/BUILDING.md
index 74da7b26b45e8f..6443e52b2277d5 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -90,7 +90,7 @@ On macOS you will need to install the `Xcode Command Line Tools` by running
 installed, you can find them under the menu `Xcode -> Open Developer Tool ->
 More Developer Tools...`. This step will install `clang`, `clang++`, and
 `make`.
-* You may want to setup [firewall rules](tools/macosx-firewall.sh)
+* After building, you may want to setup [firewall rules](tools/macosx-firewall.sh)
 to avoid popups asking to accept incoming network connections when running tests:
 
 If the path to your build directory contains a space, the build will likely fail.