diff --git a/content/fetchers/fetch_data.c b/content/fetchers/fetch_data.c
index a24fcd1e9..30274f51e 100644
--- a/content/fetchers/fetch_data.c
+++ b/content/fetchers/fetch_data.c
@@ -141,6 +141,7 @@ static bool fetch_data_process(struct fetch_data_context *c)
 	char *params;
 	char *comma;
 	char *unescaped;
+        int templen;
 	
 	/* format of a data: URL is:
 	 *   data:[<mimetype>][;base64],<data>
@@ -191,13 +192,11 @@ static bool fetch_data_process(struct fetch_data_context *c)
 	
 	/* we URL unescape the data first, just incase some insane page
 	 * decides to nest URL and base64 encoding.  Like, say, Acid2.
-         *
-         * Note: the odd cast via void* is to prevent type-punning issues.
-         *       we can be confident that size_t is at least as well aligned
-         *       as int will be.
 	 */
-	unescaped = curl_easy_unescape(curl, comma + 1, 0, (int *)((void *)&c->datalen));
-	if (unescaped == NULL) {
+        templen = c->datalen;
+        unescaped = curl_easy_unescape(curl, comma + 1, 0, &templen);
+        c->datalen = templen;
+        if (unescaped == NULL) {
 		fetch_data_send_callback(FETCH_ERROR, c,
 			"Unable to URL decode data: URL", 0);
 		return false;