diff --git a/lib/go/camli/magic/magic.go b/lib/go/camli/magic/magic.go
index 3758f81d9..34562388a 100644
--- a/lib/go/camli/magic/magic.go
+++ b/lib/go/camli/magic/magic.go
@@ -29,6 +29,7 @@ var prefixTable = []prefixEntry{
 	{[]byte("\xff\xd8\xff\xe1"), "image/jpeg"},
 	{[]byte("\xff\xd8\xff\xe0"), "image/jpeg"},
 	{[]byte{137, 'P', 'N', 'G', '\r', '\n', 26, 10}, "image/png"},
+	{[]byte("-----BEGIN PGP PUBLIC KEY BLOCK---"), "text/x-openpgp-public-key"},
 }
 
 // Returns the emptry string if unknown.