diff --git a/include/elf.h b/include/elf.h
index b35347eee7..ea7708a4ea 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -1393,6 +1393,16 @@ typedef struct {
 #define R_RISCV_SET16         55
 #define R_RISCV_SET32         56
 
+/* RISC-V ELF Flags.  */
+#define EF_RISCV_RVC              0x0001
+#define EF_RISCV_FLOAT_ABI        0x0006
+#define EF_RISCV_FLOAT_ABI_SOFT   0x0000
+#define EF_RISCV_FLOAT_ABI_SINGLE 0x0002
+#define EF_RISCV_FLOAT_ABI_DOUBLE 0x0004
+#define EF_RISCV_FLOAT_ABI_QUAD   0x0006
+#define EF_RISCV_RVE              0x0008
+#define EF_RISCV_TSO              0x0010
+
 typedef struct elf32_rel {
   Elf32_Addr	r_offset;
   Elf32_Word	r_info;