diff --git a/unix/xserver/hw/vnc/xvnc.cc b/unix/xserver/hw/vnc/xvnc.cc
index a6f27b3..15235e1 100644
--- a/unix/xserver/hw/vnc/xvnc.cc
+++ b/unix/xserver/hw/vnc/xvnc.cc
@@ -630,7 +630,11 @@
 
 	for (i = 0; i < entries; i++)  ppix[i] = i;
 	/* XXX truecolor */
+#if XORG < 19
 	QueryColors(pmap, entries, ppix, prgb);
+#else
+	QueryColors(pmap, entries, ppix, prgb, serverClient);
+#endif
 
 	for (i = 0; i < entries; i++) { /* convert xrgbs to xColorItems */
 	    defs[i].pixel = ppix[i] & 0xff; /* change pixel to index */