diff --git a/share/man/man4/ddb.4 b/share/man/man4/ddb.4
index f84982f7e3d0..39ac91d1175b 100644
--- a/share/man/man4/ddb.4
+++ b/share/man/man4/ddb.4
@@ -196,13 +196,19 @@ display as an instruction
 .It Li I
 display as an instruction with possible alternate formats depending on the
 machine:
-.Bl -tag -width MIPS -compact
-.It Tn VAX
-don't assume that each external label is a procedure entry mask
+.Bl -tag -width powerpc -compact
+.It Tn alpha
+Show the registers of the instruction.
+.It Tn amd64
+No alternate format
 .It Tn i386
-don't round to the next long word boundary
-.It Tn MIPS
-print register contents
+No alternate format
+.It Tn ia64
+No alternate format
+.It Tn powerpc
+No alternate format
+.It Tn sparc64
+No alternate format
 .El
 .El
 .It Cm xf