diff --git a/common/rfb/Decoder.cxx b/common/rfb/Decoder.cxx
index e201821..9982c93 100644
--- a/common/rfb/Decoder.cxx
+++ b/common/rfb/Decoder.cxx
@@ -27,6 +27,10 @@
 
 using namespace rfb;
 
+Decoder::Decoder(CMsgReader* reader_) : reader(reader_)
+{
+}
+
 Decoder::~Decoder()
 {
 }