There is no imsg_seek_set_n{32,64}, but imsg_set_n{32,64}.
diff refs/heads/master 34767f41b5371661bc7d3b47c3f780279d1bcd9c
commit - c7bb30c9e72387bdcf13f2516a8d63c49f7eae54
commit + 34767f41b5371661bc7d3b47c3f780279d1bcd9c
blob - 11915f377f9b38df97bd67ca9b1768962a998637
blob + db3021ed6c199c4fef8f544313894999fe1b4380
--- lib/libutil/imsg_init.3
+++ lib/libutil/imsg_init.3
@@ -472,9 +472,9 @@ with the data of extent
.Pp
.Fn ibuf_set_n8 ,
.Fn ibuf_set_n16 ,
-.Fn ibuf_seek_set_n32
+.Fn ibuf_set_n32
and
-.Fn ibuf_seek_set_n64
+.Fn ibuf_set_n64
replace a 1-byte, 2-byte, 4-byte or 8-byte
.Fa value
at offset
