diff --git a/include/linux/sched.h b/include/linux/sched.h
index dbd927399de8b7f0bb83a66f7996fc14f3cc0561..5c532217770c9ba365cddf0b5d6b9a8c736eeda8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1456,7 +1456,6 @@ extern struct pid *cad_pid;
 #define PF_MEMSTALL		0x01000000	/* Stalled due to lack of memory */
 #define PF_NO_SETAFFINITY	0x04000000	/* Userland is not allowed to meddle with cpus_allowed */
 #define PF_MCE_EARLY		0x08000000      /* Early kill for mce process policy */
-#define PF_MUTEX_TESTER		0x20000000	/* Thread belongs to the rt mutex tester */
 #define PF_FREEZER_SKIP		0x40000000	/* Freezer should not count it as freezable */
 #define PF_SUSPEND_TASK		0x80000000      /* This thread called freeze_processes() and should not be frozen */