diff --git a/cgminer.c b/cgminer.c
index fab5a1f2..06b9c00d 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -2300,7 +2300,7 @@ static bool submit_upstream_work(struct work *work, CURL *curl, bool resubmit)
 		char gbt_block[1024], *varint, *header;
 		unsigned char data[80];
 
-		flip256(data, work->data);
+		flip80(data, work->data);
 		header = bin2hex(data, 80);
 		sprintf(gbt_block, "%s", header);
 		free(header);
diff --git a/miner.h b/miner.h
index 91b0300f..2a19ab80 100644
--- a/miner.h
+++ b/miner.h
@@ -544,13 +544,13 @@ static inline void swab256(void *dest_p, const void *src_p)
 	dest[7] = swab32(src[0]);
 }
 
-static inline void flip256(void *dest_p, const void *src_p)
+static inline void flip80(void *dest_p, const void *src_p)
 {
 	uint32_t *dest = dest_p;
 	const uint32_t *src = src_p;
 	int i;
 
-	for (i = 0; i < 8; i++)
+	for (i = 0; i < 20; i++)
 		dest[i] = swab32(src[i]);
 }