--- poppler-20.10.0/qt5/tests/check_annotations.cpp.orig	2020-10-01 21:44:58.000000000 +0200
+++ poppler-20.10.0/qt5/tests/check_annotations.cpp	2020-10-31 18:19:05.431433716 +0100
@@ -1,4 +1,5 @@
 #include <cmath>
+#include <functional>
 #include <memory>
 #include <sstream>