diff --git a/Rakefile b/Rakefile
index 9af26a4..cf3e13d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -24,7 +24,7 @@ end
 desc "FFI compiler"
 namespace "ffi-compiler" do
   FFI::Compiler::CompileTask.new('ext/scrypt/scrypt_ext') do |t|
-    t.cflags << "-Wall"
+    t.cflags << "-Wall -rec"
     t.cflags << "-D_GNU_SOURCE=1" if RbConfig::CONFIG["host_os"].downcase =~ /mingw/
     t.cflags << "-arch x86_64 -arch i386" if t.platform.mac?
     t.ldflags << "-arch x86_64 -arch i386" if t.platform.mac?