diff --git a/include/openbsc/crc24.h b/include/openbsc/crc24.h
new file mode 100644
index 0000000..358fcb5
--- /dev/null
+++ b/include/openbsc/crc24.h
@@ -0,0 +1,8 @@
+#ifndef _CRC24_H
+#define _CRC24_H
+
+#define INIT_CRC24	0xffffff
+
+u_int32_t crc24_calc(u_int32_t fcs, u_int8_t *cp, unsigned int len);
+
+#endif