diff --git a/public/sample_ext/AMBuildScript b/public/sample_ext/AMBuildScript
index 291cce9b..a88acc26 100644
--- a/public/sample_ext/AMBuildScript
+++ b/public/sample_ext/AMBuildScript
@@ -135,7 +135,7 @@ class ExtensionConfig(object):
     elif cxx.vendor == 'msvc':
       self.configure_msvc(cxx)
 
-    # Optimizaiton
+    # Optimization
     if builder.options.opt == '1':
       cxx.defines += ['NDEBUG']