diff --git a/gui/listbox.cpp b/gui/listbox.cpp
index 626cbac..99e2ded 100644
--- a/gui/listbox.cpp
+++ b/gui/listbox.cpp
@@ -51,7 +51,7 @@
 #define SCROLLING_FLOOR 10
 #define SCROLLING_MULTIPLIER 6
 
-GUIListBox::GUIListBox(xml_node<>* node)
+GUIListBox::GUIListBox(xml_node<>* node) : GUIObject(node)
 {
 	xml_attribute<>* attr;
 	xml_node<>* child;
@@ -352,6 +352,9 @@
 
 int GUIListBox::Render(void)
 {
+	if(!isConditionTrue())
+		return 0;
+
 	// First step, fill background
 	gr_color(mBackgroundColor.red, mBackgroundColor.green, mBackgroundColor.blue, 255);
 	gr_fill(mRenderX, mRenderY + mHeaderH, mRenderW, mRenderH - mHeaderH);
@@ -522,6 +525,9 @@
 
 int GUIListBox::Update(void)
 {
+	if(!isConditionTrue())
+		return 0;
+
 	if (!mHeaderIsStatic) {
 		std::string newValue = gui_parse_text(mHeaderText);
 		if (mLastValue != newValue) {
@@ -602,6 +608,9 @@
 
 int GUIListBox::NotifyTouch(TOUCH_STATE state, int x, int y)
 {
+	if(!isConditionTrue())
+		return -1;
+
 	static int lastY = 0, last2Y = 0, fastScroll = 0;
 	int selection = 0;
 
@@ -753,6 +762,9 @@
 
 int GUIListBox::NotifyVarChange(std::string varName, std::string value)
 {
+	if(!isConditionTrue())
+		return 0;
+
 	if (!mHeaderIsStatic) {
 		std::string newValue = gui_parse_text(mHeaderText);
 		if (mLastValue != newValue) {