diff --git a/src/applets/lock.c b/src/applets/lock.c
index 9fb098d..e68b1ef 100644
--- a/src/applets/lock.c
+++ b/src/applets/lock.c
@@ -68,6 +68,7 @@ PanelAppletDefinition applet =
 static Lock * _lock_init(PanelAppletHelper * helper, GtkWidget ** widget)
 {
 	Lock * lock;
+	GtkIconSize iconsize;
 	GtkWidget * image;
 
 	if((lock = malloc(sizeof(*lock))) == NULL)
@@ -79,8 +80,8 @@ static Lock * _lock_init(PanelAppletHelper * helper, GtkWidget ** widget)
 	lock->pr_box = NULL;
 	lock->pr_command = NULL;
 	lock->widget = gtk_button_new();
-	image = gtk_image_new_from_icon_name("gnome-lockscreen",
-			panel_window_get_icon_size(helper->window));
+	iconsize = panel_window_get_icon_size(helper->window);
+	image = gtk_image_new_from_icon_name("gnome-lockscreen", iconsize);
 	gtk_button_set_image(GTK_BUTTON(lock->widget), image);
 	gtk_button_set_relief(GTK_BUTTON(lock->widget), GTK_RELIEF_NONE);
 #if GTK_CHECK_VERSION(2, 12, 0)