diff --git a/pkgs/development/libraries/libasyncns/default.nix b/pkgs/development/libraries/libasyncns/default.nix
index f7805c9f375f..feb6400ab066 100644
--- a/pkgs/development/libraries/libasyncns/default.nix
+++ b/pkgs/development/libraries/libasyncns/default.nix
@@ -8,6 +8,11 @@ stdenv.mkDerivation rec {
     sha256 = "0x5b6lcic4cd7q0bx00x93kvpyzl7n2abbgvqbrlzrfb8vknc6jg";
   };
 
+  configureFlags = stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+    "ac_cv_func_malloc_0_nonnull=yes"
+    "ac_cv_func_realloc_0_nonnull=yes"
+  ];
+
   meta = with stdenv.lib; {
     homepage = http://0pointer.de/lennart/projects/libasyncns/;
     description = "A C library for Linux/Unix for executing name service queries asynchronously";