1 files changed, 5 insertions, 0 deletions
diff --git a/lib/sendf.h b/lib/sendf.h
index 082feddcb..bafa999ba 100644
--- a/lib/sendf.h
+++ b/lib/sendf.h
@@ -53,4 +53,9 @@ CURLcode Curl_write(struct connectdata *conn, int sockfd,
                     void *mem, size_t len,
                     ssize_t *written);
 
+/* the function used to output verbose information */
+int Curl_debug(struct SessionHandle *handle, curl_infotype type,
+               char *data, size_t size);
+
+
 #endif