diff --git a/src/core/emulator_settings.h b/src/core/emulator_settings.h
index f69bcdd2e..13e1b7687 100644
--- a/src/core/emulator_settings.h
+++ b/src/core/emulator_settings.h
@@ -7,6 +7,7 @@
 #include <functional>
 #include <memory>
 #include <mutex>
+#include <sstream>
 #include <string>
 #include <vector>
 #include <nlohmann/json.hpp>