diff --git a/shell/cc-panel.c b/shell/cc-panel.c
index d3c6151de..8a299c681 100644
--- a/shell/cc-panel.c
+++ b/shell/cc-panel.c
@@ -53,6 +53,12 @@ typedef struct
 
 G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (CcPanel, cc_panel, GTK_TYPE_BIN)
 
+enum
+{
+  SIDEBAR_ACTIVATED,
+  LAST_SIGNAL
+};
+
 enum
 {
   PROP_0,
@@ -63,6 +69,8 @@ enum
 
 static GParamSpec *properties [N_PROPS];
 
+static guint signals [LAST_SIGNAL] = { 0 };
+
 static void
 cc_panel_set_property (GObject      *object,
                        guint         prop_id,
@@ -152,6 +160,13 @@ cc_panel_class_init (CcPanelClass *klass)
   object_class->set_property = cc_panel_set_property;
   object_class->finalize = cc_panel_finalize;
 
+  signals[SIDEBAR_ACTIVATED] = g_signal_new ("sidebar-activated",
+                                             G_TYPE_FROM_CLASS (object_class),
+                                             G_SIGNAL_RUN_LAST,
+                                             0, NULL, NULL,
+                                             g_cclosure_marshal_VOID__VOID,
+                                             G_TYPE_NONE, 0);
+
   properties[PROP_SHELL] = g_param_spec_object ("shell",
                                                 "Shell",
                                                 "Shell the Panel resides in",