diff --git a/pkgs/tools/networking/ntp/default.nix b/pkgs/tools/networking/ntp/default.nix
index 57d2ee8ab71..f96d14e83c0 100644
--- a/pkgs/tools/networking/ntp/default.nix
+++ b/pkgs/tools/networking/ntp/default.nix
@@ -3,14 +3,14 @@
 assert stdenv.isLinux -> libcap != null;
  
 stdenv.mkDerivation {
-  name = "ntp-4.2.4p3";
+  name = "ntp-4.2.4p4";
   src = fetchurl {
-    url = http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2.4p3.tar.gz;
-    sha256 = "077y1hw6v0qnp3j3w3pcxgsc76waswqhwsbzfj3jqc79jfh65jv9";
+    url = http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2.4p4.tar.gz;
+    sha256 = "0im89i51ap7aqlhxq5isz5xg4h8w8ahwdhir8la3c83h3p47fcmv";
   };
-  configureFlags = "
+  configureFlags = ''
     --without-crypto
     ${if stdenv.isLinux then "--enable-linuxcaps" else ""}
-  ";
+  '';
   buildInputs = if stdenv.isLinux then [libcap] else [];
 }