diff --git a/lib/sg_pool.c b/lib/sg_pool.c
index b3b8cf6..f1cc837 100644
--- a/lib/sg_pool.c
+++ b/lib/sg_pool.c
@@ -102,7 +102,9 @@ EXPORT_SYMBOL_GPL(sg_free_table_chained);
  *
  *  Description:
  *    Allocate and chain SGLs in an sg table. If @nents@ is larger than
- *    @nents_first_chunk a chained sg table will be setup.
+ *    @nents_first_chunk a chained sg table will be setup. @first_chunk is
+ *    ignored if nents_first_chunk <= 1 because user expects the SGL points
+ *    non-chain SGL.
  *
  **/
 int sg_alloc_table_chained(struct sg_table *table, int nents,
@@ -121,7 +123,7 @@ int sg_alloc_table_chained(struct sg_table *table, int nents,
 	}
 
 	/* User supposes that the 1st SGL includes real entry */
-	if (nents_first_chunk == 1) {
+	if (nents_first_chunk <= 1) {
 		first_chunk = NULL;
 		nents_first_chunk = 0;
 	}