diff --git a/hf_protocol.h b/hf_protocol.h
index 81707973..387c2847 100644
--- a/hf_protocol.h
+++ b/hf_protocol.h
@@ -46,7 +46,7 @@
 #define GN_DIE_TEMPERATURE(a)           ((((float)(a)*240)/4096.0)-61.5)
 
 // The sequence distance between a sent and received sequence number.
-#define SEQUENCE_DISTANCE(tx,rx)        ((tx)>=(rx)?((tx)-(rx)):(info->num_sequence+(tx)-(rx)))
+#define HF_SEQUENCE_DISTANCE(tx,rx)        ((tx)>=(rx)?((tx)-(rx)):(info->num_sequence+(tx)-(rx)))
 
 // Values the protocol field in the above structure may take
 #define PROTOCOL_USB_MAPPED_SERIAL      0