diff --git a/include/elf.h b/include/elf.h
index c117a4d1ab..d9bf4a95d8 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -172,6 +172,8 @@ typedef struct mips_elf_abiflags_v0 {
 
 #define EM_UNICORE32    110     /* UniCore32 */
 
+#define EM_RX           173     /* Renesas RX family */
+
 #define EM_RISCV        243     /* RISC-V */
 
 #define EM_NANOMIPS     249     /* Wave Computing nanoMIPS */