Description: Fix FTBFS with GCC 10
Author: Axel Beckert <abe@debian.org>
Bug-Debian: https://bugs.debian.org/966875

--- a/src/generic/views/download_progress.h
+++ b/src/generic/views/download_progress.h
@@ -29,6 +29,7 @@
 #include <optional>
 #include <string>
 #include <vector>
+#include <sstream>
 
 namespace aptitude
 {
