diff --git a/common/rfb/Encoder.h b/common/rfb/Encoder.h
index e135ec0..d5a0288 100644
--- a/common/rfb/Encoder.h
+++ b/common/rfb/Encoder.h
@@ -42,7 +42,8 @@
   class Encoder {
   public:
     Encoder(SConnection* conn, int encoding,
-            enum EncoderFlags flags, unsigned int maxPaletteSize=-1);
+            enum EncoderFlags flags, unsigned int maxPaletteSize=-1,
+            int losslessQuality=-1);
     virtual ~Encoder();
 
     // isSupported() should return a boolean indicating if this encoder
@@ -95,6 +96,10 @@
     // Maximum size of the palette per rect
     const unsigned int maxPaletteSize;
 
+    // Minimum level where the quality loss will not be noticed by
+    // most users (only relevant with EncoderLossy flag)
+    const int losslessQuality;
+
   protected:
     SConnection* conn;
   };