--- a/src/tools/qmap.h	2008-01-16 06:09:13.000000000 +1100
+++ b/src/tools/qmap.h	2018-01-07 11:32:38.720893324 +1100
@@ -52,6 +52,7 @@
 #ifndef QT_NO_STL
 #include <iterator>
 #include <map>
+#include <stddef.h>
 #endif
 
 //#define QT_CHECK_MAP_RANGE
--- a/src/tools/qvaluelist.h	2008-01-16 06:09:13.000000000 +1100
+++ b/src/tools/qvaluelist.h	2018-01-07 11:33:03.393206961 +1100
@@ -50,6 +50,7 @@
 #ifndef QT_NO_STL
 #include <iterator>
 #include <list>
+#include <stddef.h>
 #endif
 
 //#define QT_CHECK_VALUELIST_RANGE
