diff --git a/BUILDING.md b/BUILDING.md
index dc159c8b539901..97b97bab23dca3 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -523,8 +523,8 @@ installing `ccache` can help to greatly reduce build times. Set up with:
 $ sudo apt install ccache   # for Debian/Ubuntu, included in most Linux distros
 $ ccache -o cache_dir=<tmp_dir>
 $ ccache -o max_size=5.0G
-$ export CC="ccache gcc"    # add to your .profile
-$ export CXX="ccache g++"   # add to your .profile
+$ export CC="ccache gcc"    # add to your .profile, use cc (not gcc) on macOS
+$ export CXX="ccache g++"   # add to your .profile, use c++ (not g++) on macOS
 ```
 
 This will allow for near-instantaneous rebuilds even when switching branches.