diff --git a/src/link/MachO/dead_strip.zig b/src/link/MachO/dead_strip.zig
index 82a174a1a8..563d68cc89 100644
--- a/src/link/MachO/dead_strip.zig
+++ b/src/link/MachO/dead_strip.zig
@@ -465,8 +465,8 @@ fn prune(zld: *Zld, alive: AtomTable) void {
                     section.last_atom_index = prev_index;
                 } else {
                     assert(section.header.size == 0);
-                    section.first_atom_index = undefined;
-                    section.last_atom_index = undefined;
+                    section.first_atom_index = 0;
+                    section.last_atom_index = 0;
                 }
             }