diff --git a/lib/debug.rb b/lib/debug.rb
index ce8b7d7fb9..6f519c6c77 100644
--- a/lib/debug.rb
+++ b/lib/debug.rb
@@ -427,7 +427,7 @@ class DEBUGGER__
             pos = $2
             if $1
               klass = debug_silent_eval($1, binding)
-              file = $1
+              file = File.expand_path($1)
             end
             if pos =~ /^\d+$/
               pname = pos