diff --git a/pkgs/servers/mail/popa3d/default.nix b/pkgs/servers/mail/popa3d/default.nix
index 9678bfe3fa28..d36d26b5d520 100644
--- a/pkgs/servers/mail/popa3d/default.nix
+++ b/pkgs/servers/mail/popa3d/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl,  openssl }:
+{ lib, stdenv, fetchurl,  openssl, libxcrypt }:
 
 stdenv.mkDerivation rec {
   pname = "popa3d";
@@ -9,7 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "1g48cd74sqhl496wmljhq44iyfpghaz363a1ip8nyhpjz7d57f03";
   };
 
-  buildInputs = [ openssl ];
+  buildInputs = [ openssl libxcrypt ];
 
   patches = [
     ./fix-mail-spool-path.patch