diff --git a/src/hoymiles/portParameters/portParameters.cpp b/src/hoymiles/portParameters/portParameters.cpp
index 98f86e6..59c82e1 100644
--- a/src/hoymiles/portParameters/portParameters.cpp
+++ b/src/hoymiles/portParameters/portParameters.cpp
@@ -1,6 +1,7 @@
 #include <cmath>
 #include <string>
 #include <iomanip>
+#include <sstream>
 
 #include "portParameters.h"