diff --git a/evhttp.h b/evhttp.h
index 01d6395a..3b881110 100644
--- a/evhttp.h
+++ b/evhttp.h
@@ -364,6 +364,7 @@ char *evhttp_htmlescape(const char *html);
 
 /**
  * Separate the host, port and path component from a URL.
+ * XXXX This interface will change before release to become threadsafe.
  *
  * @param url the url for which to separate the components
  * @param phost pointer in which to store the pointer to the host
@@ -371,7 +372,7 @@ char *evhttp_htmlescape(const char *html);
  * @param pfile pointer in which to store the pointer to the path
  * @return 0 on success and -1 on failure
  */
-int evhttp_hostportfile(char *url, char **phost, u_short *pport, char **pfile);
+int evhttp_hostportfile(const char *url, char **phost, u_short *pport, char **pfile);
 
 #ifdef __cplusplus
 }
diff --git a/http-internal.h b/http-internal.h
index 48860f0f..96d1f770 100644
--- a/http-internal.h
+++ b/http-internal.h
@@ -117,8 +117,6 @@ void evhttp_connection_fail(struct evhttp_connection *,
 
 void evhttp_get_request(struct evhttp *, evutil_socket_t, struct sockaddr *, socklen_t);
 
-int evhttp_hostportfile(char *, char **, u_short *, char **);
-
 int evhttp_parse_lines(struct evhttp_request *, struct evbuffer*);
 
 void evhttp_start_read(struct evhttp_connection *);
diff --git a/http.c b/http.c
index dd2790c4..a29bf036 100644
--- a/http.c
+++ b/http.c
@@ -469,7 +469,7 @@ evhttp_make_header(struct evhttp_connection *evcon, struct evhttp_request *req)
 /* Separate host, port and file from URI */
 
 int
-evhttp_hostportfile(char *url, char **phost, u_short *pport, char **pfile)
+evhttp_hostportfile(const char *url, char **phost, u_short *pport, char **pfile)
 {
 	/* XXX not threadsafe. */
 	static char host[1024];
diff --git a/test/regress_http.c b/test/regress_http.c
index c696b1c0..c6a1d140 100644
--- a/test/regress_http.c
+++ b/test/regress_http.c
@@ -1372,7 +1372,7 @@ http_chunked_request_done(struct evhttp_request *req, void *arg)
 }
 
 static void
-http_chunked_test()
+http_chunked_test(void)
 {
 	struct bufferevent *bev;
 	int fd;