diff --git a/apps/openmw/mwrender/water.cpp b/apps/openmw/mwrender/water.cpp
index ee0a8973f6..954c4d1776 100644
--- a/apps/openmw/mwrender/water.cpp
+++ b/apps/openmw/mwrender/water.cpp
@@ -1,5 +1,7 @@
 #include "water.hpp"
 
+#include <sstream>
+
 #include <osg/ClipNode>
 #include <osg/Depth>
 #include <osg/Fog>