diff --git a/Malmo/src/PosixFrameWriter.h b/Malmo/src/PosixFrameWriter.h
index f97a9be51..62d1307b7 100755
--- a/Malmo/src/PosixFrameWriter.h
+++ b/Malmo/src/PosixFrameWriter.h
@@ -23,6 +23,9 @@
 // Local:
 #include "VideoFrameWriter.h"
 
+// STL:
+#include <stack>
+
 namespace malmo
 {
     class PosixFrameWriter : public VideoFrameWriter