diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
index ada8f7227f..0ba65a92e4 100644
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -1461,6 +1461,7 @@ struct QueryWindow : public Window {
 	{
 		switch (widget) {
 			case QUERY_WIDGET_CAPTION:
+				CopyInDParam(1, this->params, lengthof(this->params));
 				SetDParam(0, this->caption);
 				break;