diff --git a/src/bun.js/webcore/blob.zig b/src/bun.js/webcore/blob.zig
index 0721ee88fbdd06..274bc68f46f170 100644
--- a/src/bun.js/webcore/blob.zig
+++ b/src/bun.js/webcore/blob.zig
@@ -910,9 +910,7 @@ pub const Blob = struct {
                             switch (result) {
                                 .success => this.promise.resolve(globalObject, JSC.jsNumber(0)),
                                 .failure => |err| {
-                                    const js_err = globalObject.createErrorInstance("{s}", .{err.message});
-                                    js_err.put(globalObject, JSC.ZigString.static("code"), JSC.ZigString.init(err.code).toJS(globalObject));
-                                    this.promise.rejectOnNextTick(globalObject, js_err);
+                                    this.promise.rejectOnNextTick(globalObject, err.toJS(globalObject));
                                 },
                             }
                         }
@@ -1061,9 +1059,7 @@ pub const Blob = struct {
                                     switch (result) {
                                         .success => this.promise.resolve(globalObject, JSC.jsNumber(this.store.data.bytes.len)),
                                         .failure => |err| {
-                                            const js_err = globalObject.createErrorInstance("{s}", .{err.message});
-                                            js_err.put(globalObject, JSC.ZigString.static("code"), JSC.ZigString.init(err.code).toJS(globalObject));
-                                            this.promise.rejectOnNextTick(globalObject, js_err);
+                                            this.promise.rejectOnNextTick(globalObject, err.toJS(globalObject));
                                         },
                                     }
                                 }
@@ -3676,9 +3672,7 @@ pub const Blob = struct {
                             self.promise.reject(globalObject, js_err);
                         },
                         .failure => |err| {
-                            const js_err = globalObject.createErrorInstance("{s}", .{err.message});
-                            js_err.put(globalObject, ZigString.static("code"), ZigString.init(err.code).toJS(globalObject));
-                            self.promise.rejectOnNextTick(globalObject, js_err);
+                            self.promise.rejectOnNextTick(globalObject, err.toJS(globalObject));
                         },
                     }
                 }
@@ -4018,9 +4012,7 @@ pub const Blob = struct {
                     this.promise.reject(this.globalThis, js_err);
                 },
                 .failure => |err| {
-                    const js_err = this.globalThis.createErrorInstance("{s}", .{err.message});
-                    js_err.put(this.globalThis, ZigString.static("code"), ZigString.init(err.code).toJS(this.globalThis));
-                    this.promise.rejectOnNextTick(this.globalThis, js_err);
+                    this.promise.rejectOnNextTick(this.globalThis, err.toJS(this.globalThis));
                 },
             }
         }
@@ -4082,9 +4074,7 @@ pub const Blob = struct {
                     this.promise.resolve(globalThis, .true);
                 },
                 .failure => |err| {
-                    const js_err = globalThis.createErrorInstance("{s}", .{err.message});
-                    js_err.put(globalThis, ZigString.static("code"), ZigString.init(err.code).toJS(globalThis));
-                    this.promise.rejectOnNextTick(globalThis, js_err);
+                    this.promise.rejectOnNextTick(globalThis, err.toJS(globalThis));
                 },
             }
         }
@@ -4103,9 +4093,7 @@ pub const Blob = struct {
                     this.promise.resolve(globalThis, JSValue.jsNumber(stat.size));
                 },
                 .failure => |err| {
-                    const js_err = globalThis.createErrorInstance("{s}", .{err.message});
-                    js_err.put(globalThis, ZigString.static("code"), ZigString.init(err.code).toJS(globalThis));
-                    this.promise.rejectOnNextTick(globalThis, js_err);
+                    this.promise.rejectOnNextTick(globalThis, err.toJS(globalThis));
                 },
             }
         }
diff --git a/src/s3.zig b/src/s3.zig
index 7bf438808e6f8f..d85ae1818e8915 100644
--- a/src/s3.zig
+++ b/src/s3.zig
@@ -459,6 +459,12 @@ pub const AWSCredentials = struct {
     pub const S3Error = struct {
         code: []const u8,
         message: []const u8,
+
+        pub fn toJS(err: *const @This(), globalObject: *JSC.JSGlobalObject) JSC.JSValue {
+            const js_err = globalObject.createErrorInstance("{s}", .{err.message});
+            js_err.put(globalObject, JSC.ZigString.static("code"), JSC.ZigString.init(err.code).toJS(globalObject));
+            return js_err;
+        }
     };
     pub const S3StatResult = union(enum) {
         success: struct {
@@ -1147,11 +1153,9 @@ pub const AWSCredentials = struct {
                 if (readable.ptr == .Bytes) {
                     const globalThis = this.readable_stream_ref.globalThis().?;
                     if (request_err) |err| {
-                        const js_err = globalThis.createErrorInstance("{s}", .{err.message});
-                        js_err.put(globalThis, JSC.ZigString.static("code"), JSC.ZigString.init(err.code).toJS(globalThis));
                         readable.ptr.Bytes.onData(
                             .{
-                                .err = .{ .JSValue = js_err },
+                                .err = .{ .JSValue = err.toJS(globalThis) },
                             },
                             bun.default_allocator,
                         );
@@ -1221,9 +1225,7 @@ pub const AWSCredentials = struct {
                             sink.abort();
                             return;
                         }
-                        const js_err = globalObject.createErrorInstance("{s}", .{err.message});
-                        js_err.put(globalObject, JSC.ZigString.static("code"), JSC.ZigString.init(err.code).toJS(globalObject));
-                        sink.endPromise.rejectOnNextTick(globalObject, js_err);
+                        sink.endPromise.rejectOnNextTick(globalObject, err.toJS(globalObject));
                     },
                 }
             }
@@ -1406,9 +1408,7 @@ pub const AWSCredentials = struct {
                                 sink.abort();
                                 return;
                             }
-                            const js_err = globalObject.createErrorInstance("{s}", .{err.message});
-                            js_err.put(globalObject, JSC.ZigString.static("code"), JSC.ZigString.init(err.code).toJS(globalObject));
-                            sink.endPromise.rejectOnNextTick(globalObject, js_err);
+                            sink.endPromise.rejectOnNextTick(globalObject, err.toJS(globalObject));
                         },
                     }
                 }