diff --git a/_examples/golang-basics/example.gen.go b/_examples/golang-basics/example.gen.go
index f739865..7263136 100644
--- a/_examples/golang-basics/example.gen.go
+++ b/_examples/golang-basics/example.gen.go
@@ -715,13 +715,18 @@ func (e WebRPCError) Unwrap() error {
 	return e.cause
 }
 
-func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
-	err := rpcErr
+func (e WebRPCError) WithCause(cause error) error {
+	err := e
 	err.cause = cause
 	err.Cause = cause.Error()
 	return err
 }
 
+// Deprecated: Use .WithCause() method on WebRPCError.
+func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
+	return rpcErr.WithCause(cause)
+}
+
 // Webrpc errors
 var (
 	ErrWebrpcEndpoint      = WebRPCError{Code: 0, Name: "WebrpcEndpoint", Message: "endpoint error", HTTPStatus: 400}
diff --git a/_examples/golang-imports/api.gen.go b/_examples/golang-imports/api.gen.go
index 74258d6..be4b50b 100644
--- a/_examples/golang-imports/api.gen.go
+++ b/_examples/golang-imports/api.gen.go
@@ -482,13 +482,18 @@ func (e WebRPCError) Unwrap() error {
 	return e.cause
 }
 
-func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
-	err := rpcErr
+func (e WebRPCError) WithCause(cause error) error {
+	err := e
 	err.cause = cause
 	err.Cause = cause.Error()
 	return err
 }
 
+// Deprecated: Use .WithCause() method on WebRPCError.
+func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
+	return rpcErr.WithCause(cause)
+}
+
 // Webrpc errors
 var (
 	ErrWebrpcEndpoint = WebRPCError{Code: 0, Name: "WebrpcEndpoint", Message: "endpoint error", HTTPStatus: 400}
diff --git a/errors.go.tmpl b/errors.go.tmpl
index 26a47f5..ea94bc5 100644
--- a/errors.go.tmpl
+++ b/errors.go.tmpl
@@ -45,8 +45,8 @@ func (e WebRPCError) Unwrap() error {
 	return e.cause
 }
 
-func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
-	err := rpcErr
+func (e WebRPCError) WithCause(cause error) error {
+	err := e
 	err.cause = cause
 	err.Cause = cause.Error()
 	{{- if $opts.errorStackTrace }}
@@ -55,6 +55,11 @@ func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
 	return err
 }
 
+// Deprecated: Use .WithCause() method on WebRPCError.
+func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
+	return rpcErr.WithCause(cause)
+}
+
 {{- if $opts.errorStackTrace -}}
 func (e WebRPCError) StackFrames() []uintptr {
 	return e.frame.frames[:]