diff --git a/miniprot.1 b/miniprot.1
index dfa08b6..4e493e1 100644
--- a/miniprot.1
+++ b/miniprot.1
@@ -289,7 +289,7 @@ Op	Description
 _
 nM	Alignment match. Consuming n*3 nucleotides and n amino acids
 nI	Insertion. Consuming n amino acids
-nD	Delection. Consuming n*3 nucleotides
+nD	Deletion. Consuming n*3 nucleotides
 nF	Frameshift deletion. Consuming n nucleotides
 nG	Frameshift match. Consuming n nucleotides and 1 amino acid
 nN	Phase-0 intron. Consuming n nucleotides