diff --git a/lib/connect.c b/lib/connect.c
index 4ad4ec403..567186a69 100644
--- a/lib/connect.c
+++ b/lib/connect.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -859,8 +859,10 @@ CURLcode Curl_is_connected(struct connectdata *conn,
 
 void Curl_tcpnodelay(struct connectdata *conn, curl_socket_t sockfd)
 {
-#ifdef TCP_NODELAY
-  struct SessionHandle *data= conn->data;
+#if defined(TCP_NODELAY)
+#if !defined(CURL_DISABLE_VERBOSE_STRINGS)
+  struct SessionHandle *data = conn->data;
+#endif
   curl_socklen_t onoff = (curl_socklen_t) 1;
   int level = IPPROTO_TCP;
 
@@ -877,6 +879,10 @@ void Curl_tcpnodelay(struct connectdata *conn, curl_socket_t sockfd)
     level = pe->p_proto;
 #endif
 
+#if defined(CURL_DISABLE_VERBOSE_STRINGS)
+  (void) conn;
+#endif
+
   if(setsockopt(sockfd, level, TCP_NODELAY, (void *)&onoff,
                 sizeof(onoff)) < 0)
     infof(data, "Could not set TCP_NODELAY: %s\n",
diff --git a/lib/curl_ntlm_msgs.c b/lib/curl_ntlm_msgs.c
index bf1aaf376..fc9547207 100644
--- a/lib/curl_ntlm_msgs.c
+++ b/lib/curl_ntlm_msgs.c
@@ -170,6 +170,10 @@ static CURLcode ntlm_decode_type2_target(struct SessionHandle *data,
   unsigned short target_info_len = 0;
   unsigned int target_info_offset = 0;
 
+#if defined(CURL_DISABLE_VERBOSE_STRINGS)
+  (void) data;
+#endif
+
   if(size >= 48) {
     target_info_len = Curl_read16_le(&buffer[40]);
     target_info_offset = Curl_read32_le(&buffer[44]);
diff --git a/lib/http.c b/lib/http.c
index 409baa7e5..b85ff0d5a 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -567,10 +567,12 @@ output_auth_headers(struct connectdata *conn,
 {
   const char *auth = NULL;
   CURLcode result = CURLE_OK;
+#if !defined(CURL_DISABLE_VERBOSE_STRINGS) || defined(USE_SPNEGO)
   struct SessionHandle *data = conn->data;
+#endif
 #ifdef USE_SPNEGO
-  struct negotiatedata *negdata = proxy?
-    &data->state.proxyneg:&data->state.negotiate;
+  struct negotiatedata *negdata = proxy ?
+    &data->state.proxyneg : &data->state.negotiate;
 #endif
 
 #ifdef CURL_DISABLE_CRYPTO_AUTH