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-rw-r--r--gtk/gtkscalebutton.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/gtk/gtkscalebutton.c b/gtk/gtkscalebutton.c
index e74dcf2b49..82829b153f 100644
--- a/gtk/gtkscalebutton.c
+++ b/gtk/gtkscalebutton.c
@@ -70,6 +70,8 @@
*
* GtkScaleButton has a single CSS node with name button. To differentiate
* it from a plain #GtkButton, it gets the .scale style class.
+ *
+ * The popup widget that contains the scale has a .scale-popup style class.
*/