diff --git a/pkgs/development/libraries/Xaw3d/default.nix b/pkgs/development/libraries/Xaw3d/default.nix
index f90be3a751e3..83237060312f 100644
--- a/pkgs/development/libraries/Xaw3d/default.nix
+++ b/pkgs/development/libraries/Xaw3d/default.nix
@@ -16,11 +16,11 @@
 
 stdenv.mkDerivation rec {
   pname = "Xaw3d";
-  version = "1.6.5";
+  version = "1.6.6";
 
   src = fetchurl {
     url = "https://www.x.org/releases/individual/lib/libXaw3d-${version}.tar.xz";
-    sha256 = "sha256-NIHuS2dTuI4YhW6iZcuE8rAznujDu+yWaxVrOLWEGDM=";
+    sha256 = "sha256-pBw+NxNa1hax8ou95wACr788tZow3zQUH4KdMurchkY=";
   };
   dontUseImakeConfigure = true;
   nativeBuildInputs = [ pkg-config bison flex imake gccmakedep ];