1 files changed, 5 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/gzip.rb b/activesupport/lib/active_support/gzip.rb
index 35a50e9a77..62f9c9aa2e 100644
--- a/activesupport/lib/active_support/gzip.rb
+++ b/activesupport/lib/active_support/gzip.rb
@@ -5,6 +5,10 @@ module ActiveSupport
   # A convenient wrapper for the zlib standard library that allows compression/decompression of strings with gzip.
   module Gzip
     class Stream < StringIO
+      def initialize(*)
+        super
+        set_encoding "BINARY" if "".encoding_aware?
+      end
       def close; rewind; end
     end
 
@@ -22,4 +26,4 @@ module ActiveSupport
       output.string
     end
   end
-end
-\ No newline at end of file
+end