diff --git a/json.zig b/json.zig
index e2682d3c7ee66021859d76efb3dc0422cb4b5965..18f9648d4beef97d7faff52360c63a5fc103105d 100644
--- a/json.zig
+++ b/json.zig
@@ -743,7 +743,7 @@ pub fn stringify(writer: anytype, value: anytype, options: std.json.Stringify.Op
                 try writer.writeAll("\"");
             }
         } else {
-            @panic("TODO");
+            return error.Unexpected;
         }
         return;
     }
@@ -769,7 +769,7 @@ pub fn stringify(writer: anytype, value: anytype, options: std.json.Stringify.Op
                 try writer.writeAll("\"");
             }
         } else {
-            @panic("TODO");
+            return error.Unexpected;
         }
         return;
     }