diff --git a/block/curl.c b/block/curl.c
index 1c9e4f6..2c07a69 100644
--- a/block/curl.c
+++ b/block/curl.c
@@ -61,8 +61,6 @@
 
 #define CURL_NUM_STATES 8
 #define CURL_NUM_ACB    8
-#define READ_AHEAD_DEFAULT (256 * 1024)
-#define CURL_TIMEOUT_DEFAULT 5
 #define CURL_TIMEOUT_MAX 10000
 
 #define CURL_BLOCK_OPT_URL       "url"
@@ -76,6 +74,10 @@
 #define CURL_BLOCK_OPT_PROXY_USERNAME "proxy-username"
 #define CURL_BLOCK_OPT_PROXY_PASSWORD_SECRET "proxy-password-secret"
 
+#define CURL_BLOCK_OPT_READAHEAD_DEFAULT (256 * 1024)
+#define CURL_BLOCK_OPT_SSLVERIFY_DEFAULT true
+#define CURL_BLOCK_OPT_TIMEOUT_DEFAULT 5
+
 struct BDRVCURLState;
 
 static bool libcurl_initialized;
@@ -696,7 +698,7 @@
     }
 
     s->readahead_size = qemu_opt_get_size(opts, CURL_BLOCK_OPT_READAHEAD,
-                                          READ_AHEAD_DEFAULT);
+                                          CURL_BLOCK_OPT_READAHEAD_DEFAULT);
     if ((s->readahead_size & 0x1ff) != 0) {
         error_setg(errp, "HTTP_READAHEAD_SIZE %zd is not a multiple of 512",
                    s->readahead_size);
@@ -704,13 +706,14 @@
     }
 
     s->timeout = qemu_opt_get_number(opts, CURL_BLOCK_OPT_TIMEOUT,
-                                     CURL_TIMEOUT_DEFAULT);
+                                     CURL_BLOCK_OPT_TIMEOUT_DEFAULT);
     if (s->timeout > CURL_TIMEOUT_MAX) {
         error_setg(errp, "timeout parameter is too large or negative");
         goto out_noclean;
     }
 
-    s->sslverify = qemu_opt_get_bool(opts, CURL_BLOCK_OPT_SSLVERIFY, true);
+    s->sslverify = qemu_opt_get_bool(opts, CURL_BLOCK_OPT_SSLVERIFY,
+                                     CURL_BLOCK_OPT_SSLVERIFY_DEFAULT);
 
     cookie = qemu_opt_get(opts, CURL_BLOCK_OPT_COOKIE);
     cookie_secret = qemu_opt_get(opts, CURL_BLOCK_OPT_COOKIE_SECRET);