diff --git a/libexec/rtld-elf/arm/rtld_machdep.h b/libexec/rtld-elf/arm/rtld_machdep.h
index 8244e495ed5c..dd046a9d5ae8 100644
--- a/libexec/rtld-elf/arm/rtld_machdep.h
+++ b/libexec/rtld-elf/arm/rtld_machdep.h
@@ -71,16 +71,4 @@ void _rtld_bind_start(void);
 
 extern void *__tls_get_addr(tls_index *ti);
 
-#ifndef ARM_HAS_ATOMIC_CMPSET_32
-static __inline u_int32_t
-atomic_cmpset_32(volatile u_int32_t *p, u_int32_t cmpval, u_int32_t newval)
-{
-
-	if (*p == cmpval) {
-		*p = newval;
-		return (1);
-	}
-	return (0);
-}
-#endif
 #endif