diff --git a/common/uuid.c b/common/uuid.c
index dd3c7b0..ac6db50 100644
--- a/common/uuid.c
+++ b/common/uuid.c
@@ -73,6 +73,7 @@
 int read_uuid(uint8_t *dest, char *uuid)
 {
 	int err;
+	uint8_t *dest_start = dest;
 
 	/* Check that we have enough characters */
 	if (strnlen(uuid, UUID_STRING_LENGTH) != UUID_STRING_LENGTH) {
@@ -124,7 +125,7 @@
 	if (err < 0) {
 		WARN("Error parsing UUID\n");
 		/* Clear the buffer on error */
-		memset((void *)dest, '\0', UUID_BYTES_LENGTH * sizeof(uint8_t));
+		memset((void *)dest_start, '\0', UUID_BYTES_LENGTH * sizeof(uint8_t));
 		return -EINVAL;
 	}