diff --git a/minimap2.1 b/minimap2.1
index 21b84bd..ff0b922 100644
--- a/minimap2.1
+++ b/minimap2.1
@@ -638,6 +638,7 @@ s2	i	Chaining score of the best secondary chain
 NM	i	Total number of mismatches and gaps in the alignment
 MD	Z	To generate the ref sequence in the alignment
 AS	i	DP alignment score
+SA	Z	List of other supplementary alignments
 ms	i	DP score of the max scoring segment in the alignment
 nn	i	Number of ambiguous bases in the alignment
 ts	A	Transcript strand (splice mode only)