diff --git a/vncviewer/DesktopWindow.cxx b/vncviewer/DesktopWindow.cxx
index 7a5b4c3..0e438e7 100644
--- a/vncviewer/DesktopWindow.cxx
+++ b/vncviewer/DesktopWindow.cxx
@@ -69,6 +69,11 @@
 
   OptionsDialog::addCallback(handleOptions, this);
 
+#ifdef HAVE_FLTK_FULLSCREEN
+  if (fullScreen)
+    fullscreen();
+#endif
+
   show();
 
   // The window manager might give us an initial window size that is different