diff --git a/BaseTools/Conf/build_rule.template b/BaseTools/Conf/build_rule.template
index fc26a42f97..8808afff28 100644
--- a/BaseTools/Conf/build_rule.template
+++ b/BaseTools/Conf/build_rule.template
@@ -78,7 +78,7 @@
 
 ## Reserved File-Type
 #
-# Dont't change following names of file types and their associated files,
+# Don't change following names of file types and their associated files,
 # which are also used in tools' code
 #
 #   C-Code-File