diff --git a/pkgs/tools/networking/ocserv/default.nix b/pkgs/tools/networking/ocserv/default.nix
index 067c614f585..29801eebbd7 100644
--- a/pkgs/tools/networking/ocserv/default.nix
+++ b/pkgs/tools/networking/ocserv/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitLab, autoreconfHook, pkg-config, nettle, gnutls
 , libev, protobufc, guile, geoip, libseccomp, gperf, readline
-, lz4, libgssglue, ronn, pam
+, lz4, libgssglue, ronn, pam, libxcrypt
 }:
 
 stdenv.mkDerivation rec {
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ autoreconfHook gperf pkg-config ronn ];
-  buildInputs = [ nettle gnutls libev protobufc guile geoip libseccomp readline lz4 libgssglue pam ];
+  buildInputs = [ nettle gnutls libev protobufc guile geoip libseccomp readline lz4 libgssglue pam libxcrypt ];
 
   meta = with lib; {
     homepage = "https://gitlab.com/openconnect/ocserv";