Index: win/rules.vc
===================================================================
diff -u -r900390cf91d9830203a9640ef46c83192711e48e -rb9a6a8fbb41ba8403d78c43191c8372c574c8ebf
--- win/rules.vc	(.../rules.vc)	(revision 900390cf91d9830203a9640ef46c83192711e48e)
+++ win/rules.vc	(.../rules.vc)	(revision b9a6a8fbb41ba8403d78c43191c8372c574c8ebf)
@@ -1281,7 +1281,7 @@
 # Tcl without /DUNICODE, while 8.6 builds with it defined. When building
 # an extension, it is advisable (but not mandated) to use the same Windows
 # API as the Tcl build. This is accordingly defaulted below. A particular
-# extension can override this by pre-definining USE_WIDECHAR_API.
+# extension can override this by pre-defining USE_WIDECHAR_API.
 !ifndef USE_WIDECHAR_API
 !if $(TCL_VERSION) > 85
 USE_WIDECHAR_API = 1