diff --git a/rfb/CMsgWriter.cxx b/rfb/CMsgWriter.cxx
index c9912ce..fb272c4 100644
--- a/rfb/CMsgWriter.cxx
+++ b/rfb/CMsgWriter.cxx
@@ -78,7 +78,7 @@
   encodings[nEncodings++] = pseudoEncodingLastRect;
   if (cp->customCompressLevel && cp->compressLevel >= 0 && cp->compressLevel <= 9)
       encodings[nEncodings++] = pseudoEncodingCompressLevel0 + cp->compressLevel;
-  if (!cp->noJpeg && cp->qualityLevel >= 0 && cp->qualityLevel <= 9)
+  if (!cp->noJpeg && cp->qualityLevel >= 1 && cp->qualityLevel <= 9)
       encodings[nEncodings++] = pseudoEncodingQualityLevel0 + cp->qualityLevel;
 
   writeSetEncodings(nEncodings, encodings);