diff --git a/common/item.h b/common/item.h
index 22da54183..11e1ad151 100644
--- a/common/item.h
+++ b/common/item.h
@@ -33,6 +33,7 @@ class EvolveInfo;			// Stores information about an evolving item family
 
 #include <list>
 #include <map>
+#include <sstream>
 
 
 namespace ItemField