diff --git a/lib/gtls.c b/lib/gtls.c
index 6622d84..28050a7 100644
--- a/lib/gtls.c
+++ b/lib/gtls.c
@@ -739,7 +739,7 @@ static ssize_t gtls_send(struct connectdata *conn,
                        int sockindex,
                        const void *mem,
                        size_t len,
-                       int *curlcode)
+                       CURLcode *curlcode)
 {
   ssize_t rc = gnutls_record_send(conn->ssl[sockindex].session, mem, len);
 
@@ -851,7 +851,7 @@ static ssize_t gtls_recv(struct connectdata *conn, /* connection data */
                          int num,                  /* socketindex */
                          char *buf,                /* store read data here */
                          size_t buffersize,        /* max amount to read */
-                         int *curlcode)
+                         CURLcode *curlcode)
 {
   ssize_t ret;
 
@@ -869,7 +869,7 @@ static ssize_t gtls_recv(struct connectdata *conn, /* connection data */
       /* handshake() writes error message on its own */
       *curlcode = rc;
     else
-      *curlcode = -1; /* then return as if this was a wouldblock */
+      *curlcode = CURLE_AGAIN; /* then return as if this was a wouldblock */
     return -1;
   }