Backport of

https://github.com/openscad/openscad/commit/b6c170cc5dd1bc677176ee732cdb0ddae57e5cf0

--- a/src/parser.y
+++ b/src/parser.y
@@ -46,6 +46,7 @@
 #include "printutils.h"
 #include "memory.h"
 #include <sstream>
+#include <stack>
 #include <boost/filesystem.hpp>
 #include "boost-utils.h"