diff --git a/libblkid/include/crc64.h b/libblkid/include/crc64.h
new file mode 100644
index 0000000..40475d5
--- /dev/null
+++ b/libblkid/include/crc64.h
@@ -0,0 +1,9 @@
+#ifndef UTIL_LINUX_CRC64_H
+#define UTIL_LINUX_CRC64_H
+
+#include <sys/types.h>
+#include <stdint.h>
+
+extern uint64_t crc64(uint64_t seed, const unsigned char *data, size_t len);
+
+#endif