updated windows instructions more

1 files changed, 1 insertions, 1 deletions

diff --git a/BUILD.md b/BUILD.md
index 2fafa76d..9c6f7976 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -89,7 +89,7 @@ If you want to build the installer:
 
 To build the installer:
 
-* Follow the steps above until to make the .exe. You should have a folder called `dist\onionshare` with a bunch of files inside of it, including `onionshare.exe`.
+* Follow the steps above until to make the .exe. You should have a folder called `dist\onionshare` with a bunch of files inside of it, including `onionshare.exe`. Run `onionshare.exe` once before you build the installer, to compile all the `.py` files into `.pyc` files.
 * Open a command prompt, cd into the onionshare directory, and type: `makensisw setup\onionshare.nsi`. You'll find the installer, `OnionShare_Setup.exe`, inside the `dist` folder.
 
 ## Tests