diff --git a/lib/std/debug.zig b/lib/std/debug.zig
index 263610c3b47c6efc3291bdf94f461652a51f4202..dd6de989cbff6b9a6f0c12a8b3e857b765b03a9b 100644
--- a/lib/std/debug.zig
+++ b/lib/std/debug.zig
@@ -994,6 +994,8 @@ const StackIterator = union(enum) {
         .sh,
         .sheb,
         .xcore,
+        .xtensa,
+        .xtensaeb,
         => .useless,
         .hexagon,
         // The PowerPC ABIs don't actually strictly require a backchain pointer; they allow omitting