diff --git a/pkgs/applications/networking/p2p/ncdc/default.nix b/pkgs/applications/networking/p2p/ncdc/default.nix
index dd7f4a7bb60f..053f1d67882b 100644
--- a/pkgs/applications/networking/p2p/ncdc/default.nix
+++ b/pkgs/applications/networking/p2p/ncdc/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, ncurses, zlib, bzip2, sqlite, pkg-config, glib, gnutls }:
+{ lib, stdenv, fetchurl, fetchpatch, ncurses, zlib, bzip2, sqlite, pkg-config, glib, gnutls }:
 
 stdenv.mkDerivation rec {
   pname = "ncdc";
@@ -9,6 +9,15 @@ stdenv.mkDerivation rec {
     sha256 = "1bdgqd07f026qk6vpbxqsin536znd33931m3b4z44prlm9wd6pyi";
   };
 
+  patches = [
+    # Upstream fix for ncurses-6.3 support:
+    (fetchpatch {
+      name = "ncurses-6.3.patch";
+      url = "https://g.blicky.net/ncdc.git/patch/?id=4126dd51e90deb9e22dfd139cc4518a7812fcad6";
+      sha256 = "13hqkmhmbazj6cllb5b2ccgf51vsn5lri7jqkqc5xwivgcisfrij";
+    })
+  ];
+
   nativeBuildInputs = [ pkg-config ];
   buildInputs = [ ncurses zlib bzip2 sqlite glib gnutls ];