diff --git a/payloadtoolarge.go b/payloadtoolarge.go
new file mode 100644
index 0000000..6204cfb
--- /dev/null
+++ b/payloadtoolarge.go
@@ -0,0 +1,32 @@
+package errhttp
+
+type PayloadTooLarge interface {
+	ClientError
+	PayloadTooLarge()
+}
+
+type internalPayloadTooLarge struct {
+	err error
+}
+
+func PayloadTooLargeWrap(err error) error {
+	return internalPayloadTooLarge{
+		err:err,
+	}
+}
+
+func (receiver internalPayloadTooLarge) Error() string {
+	return receiver.err.Error()
+}
+
+func (receiver internalPayloadTooLarge) Err() error {
+	return receiver.err
+}
+
+func (internalPayloadTooLarge) ClientError() {
+	// Nothing here.
+}
+
+func (internalPayloadTooLarge) PayloadTooLarge() {
+	// Nothing here.
+}
diff --git a/payloadtoolarge_test.go b/payloadtoolarge_test.go
new file mode 100644
index 0000000..53ebb59
--- /dev/null
+++ b/payloadtoolarge_test.go
@@ -0,0 +1,14 @@
+package errhttp
+
+import (
+	"testing"
+)
+
+func TestPayloadTooLarge(t *testing.T) {
+
+	var x PayloadTooLarge = internalPayloadTooLarge{} // THIS IS THE LINE THAT ACTUALLY MATTERS IN THIS TEST.
+
+	if nil == x {
+		t.Errorf("This should not happen.")
+	}
+}