diff --git a/pkgs/tools/X11/x11vnc/default.nix b/pkgs/tools/X11/x11vnc/default.nix
index 71c7046b0b7..4c7e8997148 100644
--- a/pkgs/tools/X11/x11vnc/default.nix
+++ b/pkgs/tools/X11/x11vnc/default.nix
@@ -24,6 +24,7 @@ stdenv.mkDerivation rec {
         --replace '"/bin/true"' '"${coreutils}/bin/true"'
         
     substituteInPlace x11vnc/ssltools.h \
+        --replace /bin/su /var/setuid-wrappers/su \
         --replace xdpyinfo ${xorg.xdpyinfo}/bin/xdpyinfo
   '';