diff --git a/src/iss/arch/riscv_hart_common.h b/src/iss/arch/riscv_hart_common.h
index 75ab778..0a5697a 100644
--- a/src/iss/arch/riscv_hart_common.h
+++ b/src/iss/arch/riscv_hart_common.h
@@ -195,7 +195,17 @@ enum riscv_csr {
     dcsr = 0x7B0,
     dpc = 0x7B1,
     dscratch0 = 0x7B2,
-    dscratch1 = 0x7B3
+    dscratch1 = 0x7B3,
+    // vector CSR
+    //  URW
+    vstart = 0x008,
+    vxsat = 0x009,
+    vxrm = 0x00A,
+    vcsr = 0x00F,
+    // URO
+    vl = 0xC20,
+    vtype = 0xC21,
+    vlenb = 0xC22,
 };
 
 enum { PRIV_U = 0, PRIV_S = 1, PRIV_M = 3, PRIV_D = 4 };