diff --git a/libc/bionic/pthread_internal.h b/libc/bionic/pthread_internal.h
index ad8be66..2dd0cff 100644
--- a/libc/bionic/pthread_internal.h
+++ b/libc/bionic/pthread_internal.h
@@ -34,12 +34,15 @@
 #include "private/bionic_lock.h"
 #include "private/bionic_tls.h"
 
-/* Has the thread been detached by a pthread_join or pthread_detach call? */
+// Has the thread been detached by a pthread_join or pthread_detach call?
 #define PTHREAD_ATTR_FLAG_DETACHED 0x00000001
 
-/* Has the thread been joined by another thread? */
+// Has the thread been joined by another thread?
 #define PTHREAD_ATTR_FLAG_JOINED 0x00000002
 
+// Should we inherit scheduling attributes from the parent on pthread_create?
+#define PTHREAD_ATTR_FLAG_INHERIT 0x00000004
+
 class pthread_key_data_t {
  public:
   uintptr_t seq; // Use uintptr_t just for alignment, as we use pointer below.