diff --git a/libc/arch-arm/include/machine/cpu-features.h b/libc/arch-arm/include/machine/cpu-features.h
index f836006..ecf6ff6 100644
--- a/libc/arch-arm/include/machine/cpu-features.h
+++ b/libc/arch-arm/include/machine/cpu-features.h
@@ -149,6 +149,13 @@
 #  define __ARM_HAVE_PC_INTERWORK
 #endif
 
+/* define _ARM_HAVE_LDREX_STREX for ARMv6 and ARMv7 architecure to be
+ * used in replacement of depricated swp instruction
+ */
+#if __ARM_ARCH__ >= 6
+#  define _ARM_HAVE_LDREX_STREX
+#endif
+
 
 /* Assembly-only macros */