diff --git a/src/thread.h b/src/thread.h
index a639cf7e..34307297 100644
--- a/src/thread.h
+++ b/src/thread.h
@@ -39,7 +39,7 @@ const size_t MAX_THREADS = 128;
 const size_t MAX_SPLITPOINTS_PER_THREAD = 8;
 const size_t MAX_SLAVES_PER_SPLITPOINT = 4;
 
-#if !defined(NO_SPINLOCK)
+#if 0
 /// Spinlock class wraps low level atomic operations to provide a spin lock
 
 class Spinlock {
diff --git a/src/types.h b/src/types.h
index c8078546..eebd69e5 100644
--- a/src/types.h
+++ b/src/types.h
@@ -31,9 +31,6 @@
 /// -DNO_PREFETCH | Disable use of prefetch asm-instruction. You may need this to
 ///               | run on some very old machines.
 ///
-/// -DNO_SPINLOCK | Use mutex instead of spinlocks. This is much slower, so you
-///               | really don't want to do this in general case.
-///
 /// -DUSE_POPCNT  | Add runtime support for use of popcnt asm-instruction. Works
 ///               | only in 64-bit mode and requires hardware with popcnt support.
 ///