1 files changed, 10 insertions, 1 deletions

diff --git a/src/unstable/json.cpp b/src/unstable/json.cpp
index adc2706..06df9b1 100644
--- a/src/unstable/json.cpp
+++ b/src/unstable/json.cpp
@@ -747,7 +747,16 @@ void Bu::Json::writeStr( const Bu::String &sStr, Bu::Stream &sOutput ) const
                 break;
 
             default:
-                sOutput.write( &(*i), 1 );
+                if( *i < 32 )
+                    sOutput.write(
+                        Bu::String("\\u%1").
+                        arg( (int32_t)*i, Bu::Fmt::hex(4).fill('0') ).
+                        end().getStr(),
+                        6
+                        );
+                else
+                    sOutput.write( &(*i), 1 );
+                break;
         }
     }
     sOutput.write("\"", 1 );