diff --git a/errors.go.tmpl b/errors.go.tmpl
index f31fd6b..cccd72f 100644
--- a/errors.go.tmpl
+++ b/errors.go.tmpl
@@ -58,6 +58,11 @@ func (e WebRPCError) WithCause(cause error) WebRPCError {
 	return err
 }
 
+func (e WebRPCError) WithCausef(msg string, args ...any) WebRPCError {
+	return e.WithCause(fmt.Errof(msg, args...))
+}
+
+
 // Deprecated: Use .WithCause() method on WebRPCError.
 func ErrorWithCause(rpcErr WebRPCError, cause error) WebRPCError {
 	return rpcErr.WithCause(cause)