diff --git a/ext/win32/lib/Win32API.rb b/ext/win32/lib/Win32API.rb
index d03ecc1c46..97b29fbf74 100644
--- a/ext/win32/lib/Win32API.rb
+++ b/ext/win32/lib/Win32API.rb
@@ -2,7 +2,7 @@
 # frozen_string_literal: true
 
 # for backward compatibility
-warn "Warning:#{caller[0].sub(/:in `.*'\z/, '')}: Win32API is deprecated after Ruby 1.9.1; use fiddle directly instead" if $VERBOSE
+warn "Win32API is deprecated after Ruby 1.9.1; use fiddle directly instead", uplevel: 2
 
 require 'fiddle/import'