Index: libpurple/protocols/facebook/api.c
===================================================================
--- a/libpurple/protocols/facebook/api.c
+++ b/libpurple/protocols/facebook/api.c
@@ -92,7 +92,7 @@ fb_api_sticker(FbApi *api, FbId sid, FbA
 void
 fb_api_contacts_delta(FbApi *api, const gchar *delta_cursor);
 
-G_DEFINE_TYPE(FbApi, fb_api, G_TYPE_OBJECT);
+G_DEFINE_TYPE_WITH_CODE(FbApi, fb_api, G_TYPE_OBJECT, G_ADD_PRIVATE(FbApi));
 
 static void
 fb_api_set_property(GObject *obj, guint prop, const GValue *val,
Index: libpurple/protocols/facebook/data.c
===================================================================
--- a/libpurple/protocols/facebook/data.c
+++ b/libpurple/protocols/facebook/data.c
@@ -59,8 +59,8 @@ static const gchar *fb_props_strs[] = {
 	"token"
 };
 
-G_DEFINE_TYPE(FbData, fb_data, G_TYPE_OBJECT);
-G_DEFINE_TYPE(FbDataImage, fb_data_image, G_TYPE_OBJECT);
+G_DEFINE_TYPE_WITH_CODE(FbData, fb_data, G_TYPE_OBJECT, G_ADD_PRIVATE(FbData));
+G_DEFINE_TYPE_WITH_CODE(FbDataImage, fb_data_image, G_TYPE_OBJECT, G_ADD_PRIVATE(FbDataImage));
 
 static void
 fb_data_dispose(GObject *obj)
Index: libpurple/protocols/facebook/json.c
===================================================================
--- a/libpurple/protocols/facebook/json.c
+++ b/libpurple/protocols/facebook/json.c
@@ -25,6 +25,7 @@
 #include <string.h>
 
 #include "json.h"
+#include "glibcompat.h"
 #include "util.h"
 
 typedef struct _FbJsonValue FbJsonValue;
@@ -50,7 +51,7 @@ struct _FbJsonValuesPrivate
 	GError *error;
 };
 
-G_DEFINE_TYPE(FbJsonValues, fb_json_values, G_TYPE_OBJECT);
+G_DEFINE_TYPE_WITH_CODE(FbJsonValues, fb_json_values, G_TYPE_OBJECT, G_ADD_PRIVATE(FbJsonValues));
 
 static void
 fb_json_values_dispose(GObject *obj)
Index: libpurple/protocols/facebook/mqtt.c
===================================================================
--- a/libpurple/protocols/facebook/mqtt.c
+++ b/libpurple/protocols/facebook/mqtt.c
@@ -62,8 +62,8 @@ struct _FbMqttMessagePrivate
 	gboolean local;
 };
 
-G_DEFINE_TYPE(FbMqtt, fb_mqtt, G_TYPE_OBJECT);
-G_DEFINE_TYPE(FbMqttMessage, fb_mqtt_message, G_TYPE_OBJECT);
+G_DEFINE_TYPE_WITH_CODE(FbMqtt, fb_mqtt, G_TYPE_OBJECT, G_ADD_PRIVATE(FbMqtt));
+G_DEFINE_TYPE_WITH_CODE(FbMqttMessage, fb_mqtt_message, G_TYPE_OBJECT, G_ADD_PRIVATE(FbMqttMessage));
 
 static void
 fb_mqtt_dispose(GObject *obj)
Index: libpurple/protocols/facebook/thrift.c
===================================================================
--- a/libpurple/protocols/facebook/thrift.c
+++ b/libpurple/protocols/facebook/thrift.c
@@ -21,6 +21,7 @@
 
 #include <string.h>
 
+#include "glibcompat.h"
 #include "thrift.h"
 
 struct _FbThriftPrivate
@@ -32,7 +33,7 @@ struct _FbThriftPrivate
 	guint lastbool;
 };
 
-G_DEFINE_TYPE(FbThrift, fb_thrift, G_TYPE_OBJECT);
+G_DEFINE_TYPE_WITH_CODE(FbThrift, fb_thrift, G_TYPE_OBJECT, G_ADD_PRIVATE(FbThrift));
 
 static void
 fb_thrift_dispose(GObject *obj)
Index: libpurple/glibcompat.h
===================================================================
--- a/libpurple/glibcompat.h
+++ b/libpurple/glibcompat.h
@@ -110,6 +110,9 @@ static inline void g_queue_free_full(GQu
                                                g_assertion_message (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
                                                                     "'" #expr "' should be NULL"); \
                                         } G_STMT_END
+#define G_ADD_PRIVATE(TypeName)         G_STMT_START { } G_STMT_END
+#else
+#define g_type_class_add_private(k,s)   G_STMT_START { } G_STMT_END
 #endif
 
 #if !GLIB_CHECK_VERSION(2, 40, 0)