diff --git a/BaseLib/PrjProcessing.cpp b/BaseLib/PrjProcessing.cpp
index c0f4dfd53c78fd313fefd8108399bd9ce022a8a5..5e79ff582ab48c55dd0b705d907ad46fe6708b6e 100644
--- a/BaseLib/PrjProcessing.cpp
+++ b/BaseLib/PrjProcessing.cpp
@@ -18,6 +18,7 @@
 #include <filesystem>
 #include <fstream>
 #include <regex>
+#include <sstream>
 
 #include "DisableFPE.h"
 #include "Error.h"