diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
index 6ee49ffc..811e5f50 100644
--- a/include/sbi/sbi_hart.h
+++ b/include/sbi/sbi_hart.h
@@ -45,6 +45,8 @@ enum sbi_hart_extensions {
 	SBI_HART_EXT_ZKR,
 	/** Hart has Smcntrpmf extension */
 	SBI_HART_EXT_SMCNTRPMF,
+	/** Hart has Xandespmu extension */
+	SBI_HART_EXT_XANDESPMU,
 
 	/** Maximum index of Hart extension */
 	SBI_HART_EXT_MAX,
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index bf8792af..c9483738 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -694,6 +694,9 @@ static inline char *sbi_hart_extension_id2string(int ext)
 	case SBI_HART_EXT_SMCNTRPMF:
 		estr = "smcntrpmf";
 		break;
+	case SBI_HART_EXT_XANDESPMU:
+		estr = "xandespmu";
+		break;
 	default:
 		break;
 	}