diff --git a/elfio/elf_types.hpp b/elfio/elf_types.hpp
index b1b225d..e6f510d 100644
--- a/elfio/elf_types.hpp
+++ b/elfio/elf_types.hpp
@@ -955,6 +955,58 @@ constexpr unsigned R_AARCH64_TLS_DTPREL64                 = 1029;
 constexpr unsigned R_AARCH64_TLS_TPREL                    = 1030;
 constexpr unsigned R_AARCH64_TLS_TPREL64                  = 1030;
 constexpr unsigned R_AARCH64_TLSDESC                      = 1031;
+//   RISC-V
+constexpr unsigned R_RISCV_NONE          = 0;
+constexpr unsigned R_RISCV_32            = 1;
+constexpr unsigned R_RISCV_64            = 2;
+constexpr unsigned R_RISCV_RELATIVE      = 3;
+constexpr unsigned R_RISCV_COPY          = 4;
+constexpr unsigned R_RISCV_JUMP_SLOT     = 5;
+constexpr unsigned R_RISCV_TLS_DTPMOD32  = 6;
+constexpr unsigned R_RISCV_TLS_DTPMOD64  = 7;
+constexpr unsigned R_RISCV_TLS_DTPREL32  = 8;
+constexpr unsigned R_RISCV_TLS_DTPREL64  = 9;
+constexpr unsigned R_RISCV_TLS_TPREL32   = 10;
+constexpr unsigned R_RISCV_TLS_TPREL64   = 11;
+constexpr unsigned R_RISCV_BRANCH        = 16;
+constexpr unsigned R_RISCV_JAL           = 17;
+constexpr unsigned R_RISCV_CALL          = 18;
+constexpr unsigned R_RISCV_CALL_PLT      = 19;
+constexpr unsigned R_RISCV_GOT_HI20      = 20;
+constexpr unsigned R_RISCV_TLS_GOT_HI20  = 21;
+constexpr unsigned R_RISCV_TLS_GD_HI20   = 22;
+constexpr unsigned R_RISCV_PCREL_HI20    = 23;
+constexpr unsigned R_RISCV_PCREL_LO12_I  = 24;
+constexpr unsigned R_RISCV_PCREL_LO12_S  = 25;
+constexpr unsigned R_RISCV_HI20          = 26;
+constexpr unsigned R_RISCV_LO12_I        = 27;
+constexpr unsigned R_RISCV_LO12_S        = 28;
+constexpr unsigned R_RISCV_TPREL_HI20    = 29;
+constexpr unsigned R_RISCV_TPREL_LO12_I  = 30;
+constexpr unsigned R_RISCV_TPREL_LO12_S  = 31;
+constexpr unsigned R_RISCV_TPREL_ADD     = 32;
+constexpr unsigned R_RISCV_ADD8          = 33;
+constexpr unsigned R_RISCV_ADD16         = 34;
+constexpr unsigned R_RISCV_ADD32         = 35;
+constexpr unsigned R_RISCV_ADD64         = 36;
+constexpr unsigned R_RISCV_SUB8          = 37;
+constexpr unsigned R_RISCV_SUB16         = 38;
+constexpr unsigned R_RISCV_SUB32         = 39;
+constexpr unsigned R_RISCV_SUB64         = 40;
+constexpr unsigned R_RISCV_GNU_VTINHERIT = 41;
+constexpr unsigned R_RISCV_GNU_VTENTRY   = 42;
+constexpr unsigned R_RISCV_ALIGN         = 43;
+constexpr unsigned R_RISCV_RVC_BRANCH    = 44;
+constexpr unsigned R_RISCV_RVC_JUMP      = 45;
+constexpr unsigned R_RISCV_RVC_LUI       = 46;
+constexpr unsigned R_RISCV_RELAX         = 51;
+constexpr unsigned R_RISCV_SUB6          = 52;
+constexpr unsigned R_RISCV_SET6          = 53;
+constexpr unsigned R_RISCV_SET8          = 54;
+constexpr unsigned R_RISCV_SET16         = 55;
+constexpr unsigned R_RISCV_SET32         = 56;
+constexpr unsigned R_RISCV_32_PCREL      = 57;
+constexpr unsigned R_RISCV_IRELATIVE     = 58;
 
 // Segment types
 constexpr Elf_Word PT_NULL         = 0;