diff --git a/Source/Core/Core/Src/State.cpp b/Source/Core/Core/Src/State.cpp
index a5d96db903..b862b317da 100644
--- a/Source/Core/Core/Src/State.cpp
+++ b/Source/Core/Core/Src/State.cpp
@@ -4,6 +4,8 @@
 #include "CoreTiming.h"
 #include "HW/HW.h"
 #include "PowerPC/PowerPC.h"
+
+#include <string>
 
 static int ev_Save;
 static int ev_Load;