diff --git a/block/curl.c b/block/curl.c
index ba8adae74f..1d19e64f0f 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -72,7 +72,6 @@ static CURLMcode __curl_multi_socket_action(CURLM *multi_handle,
 
 #define CURL_NUM_STATES 8
 #define CURL_NUM_ACB    8
-#define SECTOR_SIZE     512
 #define READ_AHEAD_DEFAULT (256 * 1024)
 #define CURL_TIMEOUT_DEFAULT 5
 #define CURL_TIMEOUT_MAX 10000
@@ -737,12 +736,12 @@ static void curl_readv_bh_cb(void *p)
     CURLAIOCB *acb = p;
     BDRVCURLState *s = acb->common.bs->opaque;
 
-    size_t start = acb->sector_num * SECTOR_SIZE;
+    size_t start = acb->sector_num * BDRV_SECTOR_SIZE;
     size_t end;
 
     // In case we have the requested data already (e.g. read-ahead),
     // we can just call the callback and be done.
-    switch (curl_find_buf(s, start, acb->nb_sectors * SECTOR_SIZE, acb)) {
+    switch (curl_find_buf(s, start, acb->nb_sectors * BDRV_SECTOR_SIZE, acb)) {
         case FIND_RET_OK:
             qemu_aio_unref(acb);
             // fall through
@@ -761,7 +760,7 @@ static void curl_readv_bh_cb(void *p)
     }
 
     acb->start = 0;
-    acb->end = (acb->nb_sectors * SECTOR_SIZE);
+    acb->end = (acb->nb_sectors * BDRV_SECTOR_SIZE);
 
     state->buf_off = 0;
     g_free(state->orig_buf);
@@ -778,8 +777,8 @@ static void curl_readv_bh_cb(void *p)
     state->acb[0] = acb;
 
     snprintf(state->range, 127, "%zd-%zd", start, end);
-    DPRINTF("CURL (AIO): Reading %d at %zd (%s)\n",
-            (acb->nb_sectors * SECTOR_SIZE), start, state->range);
+    DPRINTF("CURL (AIO): Reading %llu at %zd (%s)\n",
+            (acb->nb_sectors * BDRV_SECTOR_SIZE), start, state->range);
     curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range);
 
     curl_multi_add_handle(s->multi, state->curl);