#define EM_L1OM 180 /* Intel L1OM */
#define EM_K1OM 181 /* Intel K1OM */
#define EM_INTEL182 182 /* Reserved by Intel */
-#define EM_res183 183 /* Reserved by ARM */
-#define EM_res184 184 /* Reserved by ARM */
+#define EM_AARCH64 183 /* ARM 64-bit architecture */
+#define EM_ARM184 184 /* Reserved by ARM */
#define EM_AVR32 185 /* Atmel Corporation 32-bit microprocessor family */
#define EM_STM8 186 /* STMicroeletronics STM8 8-bit microcontroller */
#define EM_TILE64 187 /* Tilera TILE64 multicore architecture family */