diff --git a/pkgs/applications/editors/fte/default.nix b/pkgs/applications/editors/fte/default.nix
index c2b3229d4523..1c5d1f15ecb8 100644
--- a/pkgs/applications/editors/fte/default.nix
+++ b/pkgs/applications/editors/fte/default.nix
@@ -17,6 +17,8 @@ stdenv.mkDerivation rec {
   };
   src = [ ftesrc ftecommon ];
 
+  env.NIX_CFLAGS_COMPILE = "-DHAVE_STRLCAT -DHAVE_STRLCPY";
+
   buildFlags = [ "PREFIX=$(out)" ];
 
   installFlags = [ "PREFIX=$(out)" "INSTALL_NONROOT=1" ];