diff --git a/src/frontends/qt4/GuiIdListModel.cpp b/src/frontends/qt4/GuiIdListModel.cpp
index 07b38708fa..a8d3107ba7 100644
--- a/src/frontends/qt4/GuiIdListModel.cpp
+++ b/src/frontends/qt4/GuiIdListModel.cpp
@@ -76,9 +76,8 @@ bool GuiIdListModel::insertRows(int row, int count,
 	if (!rowIsValid(row))
 		return false;
 	vector<OurData>::iterator it = userData_.begin() + row;
-	OurData const v;
 	beginInsertRows(QModelIndex(), row, row + count - 1);
-	userData_.insert(it, count, v);
+	userData_.insert(it, count, OurData());
 	endInsertRows();
 	return true;
 }
diff --git a/src/support/unicode.h b/src/support/unicode.h
index 26d317e340..d8f443106e 100644
--- a/src/support/unicode.h
+++ b/src/support/unicode.h
@@ -15,6 +15,7 @@
 
 #include "support/strfwd.h"
 
+#include <cstddef>
 #include <vector>