diff --git a/common/rfb/ConnParams.cxx b/common/rfb/ConnParams.cxx
index e44facc..35b0054 100644
--- a/common/rfb/ConnParams.cxx
+++ b/common/rfb/ConnParams.cxx
@@ -33,7 +33,7 @@
     supportsLocalCursor(false), supportsLocalXCursor(false),
     supportsDesktopResize(false), supportsExtendedDesktopSize(false),
     supportsDesktopRename(false), supportsLastRect(false),
-    supportsSetDesktopSize(false),
+    supportsSetDesktopSize(false), supportsFence(false),
     customCompressLevel(false), compressLevel(6),
     noJpeg(false), qualityLevel(-1), fineQualityLevel(-1),
     subsampling(SUBSAMP_UNDEFINED),
@@ -125,6 +125,8 @@
       supportsDesktopRename = true;
     else if (encodings[i] == pseudoEncodingLastRect)
       supportsLastRect = true;
+    else if (encodings[i] == pseudoEncodingFence)
+      supportsFence = true;
     else if (encodings[i] >= pseudoEncodingCompressLevel0 &&
 	     encodings[i] <= pseudoEncodingCompressLevel9) {
       customCompressLevel = true;