diff --git a/rpcs3/rpcs3qt/gui_application.cpp b/rpcs3/rpcs3qt/gui_application.cpp
index 4ea300cc29..982e1632ed 100644
--- a/rpcs3/rpcs3qt/gui_application.cpp
+++ b/rpcs3/rpcs3qt/gui_application.cpp
@@ -73,6 +73,7 @@ bool gui_application::Init()
 		gui_log.warning("Experimental Build Warning! Build origin: %s", branch_name);
 
 		QMessageBox msg;
+		msg.setWindowModality(Qt::WindowModal);
 		msg.setWindowTitle(tr("Experimental Build Warning"));
 		msg.setIcon(QMessageBox::Critical);
 		msg.setTextFormat(Qt::RichText);