diff --git a/src/orm/schema/grammars/sqliteschemagrammar.cpp b/src/orm/schema/grammars/sqliteschemagrammar.cpp
index bee34bfff..57669079a 100644
--- a/src/orm/schema/grammars/sqliteschemagrammar.cpp
+++ b/src/orm/schema/grammars/sqliteschemagrammar.cpp
@@ -2,6 +2,8 @@
 
 #include <QRegularExpression>
 
+#include <unordered_set>
+
 #include <range/v3/view/filter.hpp>
 #include <range/v3/view/move.hpp>
 #include <range/v3/view/remove_if.hpp>