diff --git a/lib/url.c b/lib/url.c
index 2275d399f..1ffe5dae9 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -943,9 +943,9 @@ static bool SocketIsDead(int sock)
 }
 
 /*
- * Given one filled in connection struct, this function should detect if there
- * already is one that have all the significant details exactly the same and
- * thus should be used instead.
+ * Given one filled in connection struct (named needle), this function should
+ * detect if there already is one that have all the significant details
+ * exactly the same and thus should be used instead.
  */
 static bool
 ConnectionExists(struct SessionHandle *data,
@@ -964,8 +964,14 @@ ConnectionExists(struct SessionHandle *data,
     if(!check)
       /* NULL pointer means not filled-in entry */
       continue;
-    if(!needle->bits.httpproxy) {
-      /* The requested connection does not use a HTTP proxy */
+    if(!needle->bits.httpproxy || needle->protocol&PROT_SSL) {
+      /* The requested connection does not use a HTTP proxy or it
+         uses SSL. */
+
+      if(!(needle->protocol&PROT_SSL) && check->bits.httpproxy)
+        /* we don't do SSL but the cached connection has a proxy,
+           then don't match this */
+        continue;
 
       if(strequal(needle->protostr, check->protostr) &&
          strequal(needle->name, check->name) &&
@@ -1556,8 +1562,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
 
     conn->port = (data->set.use_port && allow_port)?data->set.use_port:PORT_HTTPS;
     conn->remote_port = PORT_HTTPS;
-    conn->protocol |= PROT_HTTP;
-    conn->protocol |= PROT_HTTPS;
+    conn->protocol |= PROT_HTTP|PROT_HTTPS|PROT_SSL;
 
     conn->curl_do = Curl_http;
     conn->curl_done = Curl_http_done;
@@ -1588,7 +1593,7 @@ static CURLcode CreateConnection(struct SessionHandle *data,
 
     if(strequal(conn->protostr, "FTPS")) {
 #ifdef USE_SSLEAY
-      conn->protocol |= PROT_FTPS;
+      conn->protocol |= PROT_FTPS|PROT_SSL;
 #else
       failf(data, LIBCURL_NAME
             " was built with SSL disabled, ftps: not supported!");
diff --git a/lib/urldata.h b/lib/urldata.h
index 78eddf419..8f12e8705 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -223,6 +223,7 @@ struct connectdata {
 #define PROT_LDAP    (1<<7)
 #define PROT_FILE    (1<<8)
 #define PROT_FTPS    (1<<9)
+#define PROT_SSL     (1<<10) /* protocol requires SSL */
 
   Curl_addrinfo *hostaddr; /* IP-protocol independent host info pointer list */
   char *hostent_buf; /* pointer to allocated memory for name info */