diff --git a/include/ecrecover.hpp b/include/ecrecover.hpp
new file mode 100644
index 0000000..4732795
--- /dev/null
+++ b/include/ecrecover.hpp
@@ -0,0 +1,10 @@
+#include <cstdarg>
+#include <cstdint>
+#include <cstdlib>
+#include <new>
+
+extern "C" {
+
+void ecrecover(const unsigned char *input, unsigned char *output);
+
+} // extern "C"