diff --git a/common/rfb/Security.cxx b/common/rfb/Security.cxx
index e51c891..b5f361e 100644
--- a/common/rfb/Security.cxx
+++ b/common/rfb/Security.cxx
@@ -52,6 +52,10 @@
 
 static LogWriter vlog("Security");
 
+Security::Security()
+{
+}
+
 Security::Security(StringParameter &secTypes)
 {
   char *secTypesStr;