diff --git a/libgimpwidgets/gimpframe.c b/libgimpwidgets/gimpframe.c
index 67dfba6361..93ab95c9d0 100644
--- a/libgimpwidgets/gimpframe.c
+++ b/libgimpwidgets/gimpframe.c
@@ -218,7 +218,7 @@ gimp_frame_get_label_spacing (GimpFrame *frame)
       (g_object_get_data (G_OBJECT (frame), GIMP_FRAME_IN_EXPANDER_KEY)))
     {
       gtk_widget_style_get (GTK_WIDGET (frame),
-                            "label_spacing", &spacing,
+                            "label-spacing", &spacing,
                             NULL);
     }