diff --git a/pkgs/tools/networking/flannel/default.nix b/pkgs/tools/networking/flannel/default.nix
index 53b5e4839ba..2eea08b9238 100644
--- a/pkgs/tools/networking/flannel/default.nix
+++ b/pkgs/tools/networking/flannel/default.nix
@@ -7,6 +7,8 @@ buildGoPackage rec {
 
   goPackagePath = "github.com/coreos/flannel";
 
+  hardeningDisable = [ "fortify" ];
+
   src = fetchFromGitHub {
     inherit rev;
     owner = "coreos";