diff --git a/lib/std/json.zig b/lib/std/json.zig
index fc205d2279..330c119269 100644
--- a/lib/std/json.zig
+++ b/lib/std/json.zig
@@ -2434,6 +2434,7 @@ pub fn stringify(
 
             @compileError("Unable to stringify enum '" ++ @typeName(T) ++ "'");
         },
+        .ErrorSet => return out_stream.writeAll(@errorName(value)),
         .Union => {
             if (comptime std.meta.trait.hasFn("jsonStringify")(T)) {
                 return value.jsonStringify(options, out_stream);
@@ -2646,6 +2647,7 @@ test "stringify basic types" {
     try teststringify("42", @as(u128, 42), StringifyOptions{});
     try teststringify("4.2e+01", @as(f32, 42), StringifyOptions{});
     try teststringify("4.2e+01", @as(f64, 42), StringifyOptions{});
+    try teststringify("ItBroke", @as(anyerror, error.ItBroke), StringifyOptions{});
 }
 
 test "stringify string" {