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-rw-r--r--gtk/gtkcolorbutton.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/gtk/gtkcolorbutton.c b/gtk/gtkcolorbutton.c
index 00bbc87729..47ec009baf 100644
--- a/gtk/gtkcolorbutton.c
+++ b/gtk/gtkcolorbutton.c
@@ -171,7 +171,7 @@ gtk_color_button_class_init (GtkColorButtonClass *klass)
g_param_spec_boolean ("use-alpha", P_("Use alpha"),
P_("Whether to give the color an alpha value"),
FALSE,
- GTK_PARAM_READWRITE));
+ GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
/**
* GtkColorButton:title: