diff --git a/pkgs/os-specific/linux/ipsec-tools/default.nix b/pkgs/os-specific/linux/ipsec-tools/default.nix
index b28320c0625..f1faa5c4884 100644
--- a/pkgs/os-specific/linux/ipsec-tools/default.nix
+++ b/pkgs/os-specific/linux/ipsec-tools/default.nix
@@ -18,6 +18,9 @@ stdenv.mkDerivation rec {
 
   patches = [ ./dont-create-localstatedir-during-install.patch ];
 
+  # fix build with newer gcc versions
+  preConfigure = ''substituteInPlace configure --replace "-Werror" "" '';
+
   configureFlags = ''
     --sysconfdir=/etc --localstatedir=/var
     --with-kernel-headers=${linuxHeaders}/include