diff --git a/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig b/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig
index 03fa01fbe1d..e668201097d 100644
--- a/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig
+++ b/mozilla/tools/tinderbox-configs/firefox/win32/mozconfig
@@ -17,3 +17,6 @@ ac_add_options --disable-debug
 ac_add_options --disable-tests
 ac_add_options --enable-update-packaging
 ac_add_options --enable-jemalloc
+
+WIN32_REDIST_DIR=/d/msvs8/VC/redist/x86/Microsoft.VC80.CRT
+