diff --git a/riscv/encoding.h b/riscv/encoding.h
index dff34ae19e..dcd4e248ed 100644
--- a/riscv/encoding.h
+++ b/riscv/encoding.h
@@ -4,7 +4,7 @@
 
 /*
  * This file is auto-generated by running 'make' in
- * https://github.com/riscv/riscv-opcodes (6a1be96)
+ * https://github.com/riscv/riscv-opcodes (47862ce)
  */
 
 #ifndef RISCV_CSR_ENCODING_H
@@ -3019,7 +3019,7 @@
 #define INSN_FIELD_MOP_RR_T_30 0x40000000
 #define INSN_FIELD_MOP_RR_T_27_26 0xc000000
 #define INSN_FIELD_C_MOP_T 0x700
-#define INSN_FIELD_RS2=RS1 0x1f00000
+#define INSN_FIELD_RS2_EQ_RS1 0x1f00000
 #endif
 #ifdef DECLARE_INSN
 DECLARE_INSN(add, MATCH_ADD, MASK_ADD)