diff --git a/common/rfb/ConnParams.cxx b/common/rfb/ConnParams.cxx
index d4ae589..42134c3 100644
--- a/common/rfb/ConnParams.cxx
+++ b/common/rfb/ConnParams.cxx
@@ -26,7 +26,8 @@
 using namespace rfb;
 
 ConnParams::ConnParams()
-  : majorVersion(0), minorVersion(0), width(0), height(0), useCopyRect(false),
+  : majorVersion(0), minorVersion(0), tightExtensionsEnabled(false),
+    width(0), height(0), useCopyRect(false),
     supportsLocalCursor(false), supportsLocalXCursor(false), supportsDesktopResize(true),
     supportsLastRect(false), customCompressLevel(false), compressLevel(6),
     noJpeg(false), qualityLevel(-1),