diff --git a/algorithm/bitblock.h b/algorithm/bitblock.h
new file mode 100644
index 00000000..fea6bf1c
--- /dev/null
+++ b/algorithm/bitblock.h
@@ -0,0 +1,10 @@
+#ifndef BITBLOCK_H
+#define BITBLOCK_H
+
+#include "miner.h"
+
+extern int bitblock_test(unsigned char *pdata, const unsigned char *ptarget,
+			uint32_t nonce);
+extern void bitblock_regenhash(struct work *work);
+
+#endif /* BITBLOCK_H */