1 files changed, 1 insertions, 0 deletions
diff --git a/lib/erb.rb b/lib/erb.rb
index 2c7e203923..c6e9129120 100644
--- a/lib/erb.rb
+++ b/lib/erb.rb
@@ -518,6 +518,7 @@ class ERB
 
     def compile(s)
       out = Buffer.new(self)
+      out.push("# -*- coding: #{s.encoding} -*-")
 
       content = ''
       scanner = make_scanner(s)