diff --git a/src/link/MachO/eh_frame.zig b/src/link/MachO/eh_frame.zig
index d03aaa63b1..b67fc9d251 100644
--- a/src/link/MachO/eh_frame.zig
+++ b/src/link/MachO/eh_frame.zig
@@ -53,6 +53,7 @@ pub const Cie = struct {
                     else => @panic("unexpected lsda encoding"), // TODO error
                 }
             },
+            'S' => {}, // skip
             else => @panic("unexpected augmentation string"), // TODO error
         };
     }