diff --git a/mac/Build.txt b/mac/Build.txt
index 16fe3f345..9da548acc 100644
--- a/mac/Build.txt
+++ b/mac/Build.txt
@@ -41,7 +41,8 @@ can be found on our wiki at http://wiki.audacityteam.org/wiki/Building_On_Mac
 
    unzip wxWidgets-audacity-fixes.zip
 
-10) And finally build/install wxWidgets:
+10) Change directory to the folder wxWidgets was extracted to then build/install 
+    wxWidgets:
 
    sudo <path to Audacity source>/mac/build_wxwidgets .