diff --git a/AMBuildScript b/AMBuildScript
index 813dbd7..9e26ff6 100644
--- a/AMBuildScript
+++ b/AMBuildScript
@@ -346,7 +346,6 @@ class ExtensionConfig(object):
       '/TP',
     ]
     cxx.linkflags += [
-      '/MACHINE:X86',
       'kernel32.lib',
       'user32.lib',
       'gdi32.lib',
@@ -578,4 +577,4 @@ BuildScripts = [
   'buildbot/BreakpadSymbols'
 ]
 
-builder.Build(BuildScripts, {'Extension': Extension})
\ No newline at end of file
+builder.Build(BuildScripts, {'Extension': Extension})