diff --git a/common/rfb/PixelFormat.h b/common/rfb/PixelFormat.h
index c3db878..db12988 100644
--- a/common/rfb/PixelFormat.h
+++ b/common/rfb/PixelFormat.h
@@ -105,6 +105,12 @@
     int redBits, greenBits, blueBits;
     int maxBits, minBits;
     bool endianMismatch;
+
+    static rdr::U8 upconvTable[256*8];
+
+    class Init;
+    friend class Init;
+    static Init _init;
   };
 }