diff --git a/src/cs_error.hh b/src/cs_error.hh
new file mode 100644
index 0000000..0a1aaf8
--- /dev/null
+++ b/src/cs_error.hh
@@ -0,0 +1,32 @@
+#ifndef LIBCUBESCRIPT_ERROR_HH
+#define LIBCUBESCRIPT_ERROR_HH
+
+#include <cubescript/cubescript.hh>
+
+#include <cstdio>
+#include <cstddef>
+
+namespace cubescript {
+
+struct error_p {
+    template<typename ...A>
+    static error make(state &cs, std::string_view msg, A const &...args) {
+        std::size_t sz = msg.size() + 64;
+        char *buf, *sp;
+        for (;;) {
+            buf = state_p{cs}.ts().request_errbuf(sz, sp);
+            int written = std::snprintf(buf, sz, msg.data(), args...);
+            if (written <= 0) {
+                throw error{cs, "malformed format string"};
+            } else if (std::size_t(written) <= sz) {
+                break;
+            }
+            sz = std::size_t(written);
+        }
+        return error{cs, sp, buf + sz};
+    }
+};
+
+} /* namespace cubescript */
+
+#endif