diff --git a/engines/saga2/modal.cpp b/engines/saga2/modal.cpp
index b23153b3ba0..557600ad16f 100644
--- a/engines/saga2/modal.cpp
+++ b/engines/saga2/modal.cpp
@@ -61,10 +61,12 @@ extern void updateWindowSection(const Rect16 &r);
 
 ModalWindow *ModalWindow::current = NULL;
 
-ModalWindow::ModalWindow(const Rect16 &r,
-                         uint16 ident,
-                         AppFunc *cmd)
-	: DecoratedWindow(r, ident, "DialogWindow", cmd) {
+ModalWindow::ModalWindow(const Rect16 &r, uint16 ident, AppFunc *cmd)
+		: DecoratedWindow(r, ident, "DialogWindow", cmd) {
+	prevModeStackCtr = 0;
+
+	for (int i = 0; i < Max_Modes; i++)
+		prevModeStackPtr[i] = 0;
 }
 
 ModalWindow::~ModalWindow(void) {