diff --git a/include/sbi/sbi_domain.h b/include/sbi/sbi_domain.h
index b90f59c7..00662a16 100644
--- a/include/sbi/sbi_domain.h
+++ b/include/sbi/sbi_domain.h
@@ -175,7 +175,7 @@ int sbi_domain_register(struct sbi_domain *dom,
  * @param reg pointer to the memory region to be added
  *
  * @return 0 on success
- * @return SBI_EALREADY if memory region conflicts with existing
+ * @return SBI_EALREADY if memory region conflicts with the existing one
  * @return SBI_EINVAL otherwise
  */
 int sbi_domain_root_add_memregion(const struct sbi_domain_memregion *reg);