diff --git a/Adafruit_MQTT_CC3000.h b/Adafruit_MQTT_CC3000.h
index f064f0c..e7e8eba 100644
--- a/Adafruit_MQTT_CC3000.h
+++ b/Adafruit_MQTT_CC3000.h
@@ -37,9 +37,13 @@
 // in the compilation of the library).
 class Adafruit_MQTT_CC3000 : public Adafruit_MQTT {
  public:
-  Adafruit_MQTT_CC3000(Adafruit_CC3000 *cc3k, const char *server, uint16_t port,
-                       const char *cid, const char *user, const char *pass):
-    Adafruit_MQTT(server, port, cid, user, pass),
+  Adafruit_MQTT_CC3000(Adafruit_CC3000 *cc3k,
+                       const char *server = "io.adafruit.com",
+                       uint16_t port = 1883,
+                       const char *user = "",
+                       const char *pass = "",
+                       const char *cid = ""):
+    Adafruit_MQTT(server, port, user, pass, cid),
     cc3000(cc3k)
   {}
 
diff --git a/Adafruit_MQTT_Client.h b/Adafruit_MQTT_Client.h
index 416aef2..20d704f 100644
--- a/Adafruit_MQTT_Client.h
+++ b/Adafruit_MQTT_Client.h
@@ -35,10 +35,13 @@
 // and even other platforms like ESP8266.
 class Adafruit_MQTT_Client : public Adafruit_MQTT {
  public:
-  Adafruit_MQTT_Client(Client *client, const char *server, uint16_t port,
-                       const char *cid, const char *user,
-                       const char *pass):
-    Adafruit_MQTT(server, port, cid, user, pass),
+  Adafruit_MQTT_Client(Client *client,
+                       const char *server = "io.adafruit.com",
+                       uint16_t port = 1883,
+                       const char *user = "",
+                       const char *pass = "",
+                       const char *cid = ""):
+    Adafruit_MQTT(server, port, user, pass, cid),
     client(client)
   {}
 
diff --git a/Adafruit_MQTT_FONA.h b/Adafruit_MQTT_FONA.h
index 204d10f..ec308f9 100644
--- a/Adafruit_MQTT_FONA.h
+++ b/Adafruit_MQTT_FONA.h
@@ -35,9 +35,13 @@
 // in the compilation of the library).
 class Adafruit_MQTT_FONA : public Adafruit_MQTT {
  public:
-  Adafruit_MQTT_FONA(Adafruit_FONA *f, const char *server, uint16_t port,
-                       const char *cid, const char *user, const char *pass):
-    Adafruit_MQTT(server, port, cid, user, pass),
+  Adafruit_MQTT_FONA(Adafruit_FONA *f,
+                       const char *server = "io.adafruit.com",
+                       uint16_t port = 1883,
+                       const char *user = "",
+                       const char *pass = "",
+                       const char *cid = ""):
+    Adafruit_MQTT(server, port, user, pass, cid),
     fona(f)
   {}