diff --git a/win32/mkexports.rb b/win32/mkexports.rb
index 4fc7e993c1..1250673c6f 100755
--- a/win32/mkexports.rb
+++ b/win32/mkexports.rb
@@ -122,7 +122,7 @@ class Exports::Mswin < Exports
           elsif !l.sub!(/^(\S+) \([^@?\`\']*\)$/, '\1')
             next
           end
-          next if /\A__+ucrt_/ =~ l
+          next if /\A_?ucrt_/ =~ l
         when /DLL/
           next unless l.sub!(/^\s*\d+\s+[[:xdigit:]]+\s+[[:xdigit:]]+\s+/, '')
         else