diff --git a/src/riscv/riscv.h b/src/riscv/riscv.h
index da9d8e6..f832cb3 100644
--- a/src/riscv/riscv.h
+++ b/src/riscv/riscv.h
@@ -89,6 +89,7 @@ enum riscv_isa_ext_id {
   RISCV_ISA_EXT_ZAAMO,
   RISCV_ISA_EXT_ZALRSC,
   RISCV_ISA_EXT_ZICBOP,
+  RISCV_ISA_EXT_IME,
   RISCV_ISA_EXT_ID_MAX
 };