diff --git a/docs/reference/gtk/gtk3-sections.txt b/docs/reference/gtk/gtk3-sections.txt
index 9b3f52c6c0..4543494987 100644
--- a/docs/reference/gtk/gtk3-sections.txt
+++ b/docs/reference/gtk/gtk3-sections.txt
@@ -6046,6 +6046,7 @@ GTK_STYLE_CLASS_SIDEBAR
 GTK_STYLE_CLASS_SLIDER
 GTK_STYLE_CLASS_SPINBUTTON
 GTK_STYLE_CLASS_SPINNER
+GTK_STYLE_CLASS_STATUSBAR
 GTK_STYLE_CLASS_SUBTITLE
 GTK_STYLE_CLASS_SUGGESTED_ACTION
 GTK_STYLE_CLASS_TITLE
diff --git a/gtk/gtkstatusbar.c b/gtk/gtkstatusbar.c
index 18f974e6bb..9cb3106670 100644
--- a/gtk/gtkstatusbar.c
+++ b/gtk/gtkstatusbar.c
@@ -183,10 +183,14 @@ gtk_statusbar_init (GtkStatusbar *statusbar)
 {
   GtkStatusbarPrivate *priv;
   GtkShadowType shadow_type;
+  GtkStyleContext *context;
 
   statusbar->priv = gtk_statusbar_get_instance_private (statusbar);
   priv = statusbar->priv;
 
+  context = gtk_widget_get_style_context (GTK_WIDGET (statusbar));
+  gtk_style_context_add_class (context, GTK_STYLE_CLASS_STATUSBAR);
+
   priv->seq_context_id = 1;
   priv->seq_message_id = 1;
   priv->messages = NULL;
diff --git a/gtk/gtkstylecontext.h b/gtk/gtkstylecontext.h
index 8052a04dad..75930b873b 100644
--- a/gtk/gtkstylecontext.h
+++ b/gtk/gtkstylecontext.h
@@ -354,6 +354,17 @@ struct _GtkStyleContextClass
  */
 #define GTK_STYLE_CLASS_INLINE_TOOLBAR "inline-toolbar"
 
+/**
+ * GTK_STYLE_CLASS_STATUSBAR:
+ *
+ * A CSS class to match statusbars.
+ *
+ * This is used in #GtkStatusbar.
+ *
+ * Since: 3.16
+ */
+#define GTK_STYLE_CLASS_STATUSBAR "statusbar"
+
 /**
  * GTK_STYLE_CLASS_RADIO:
  *