diff --git a/pkgs/tools/filesystems/reiserfsprogs/default.nix b/pkgs/tools/filesystems/reiserfsprogs/default.nix
index 899f9463951..e41318a982c 100644
--- a/pkgs/tools/filesystems/reiserfsprogs/default.nix
+++ b/pkgs/tools/filesystems/reiserfsprogs/default.nix
@@ -11,6 +11,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libuuid ];
 
+  NIX_CFLAGS_COMPILE = "-std=gnu90";
+
   meta = {
     inherit version;
     homepage = http://www.namesys.com/;