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-rw-r--r--cmdline/apt-internal-solver.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/cmdline/apt-internal-solver.cc b/cmdline/apt-internal-solver.cc
index aef7636e9..53b38ea43 100644
--- a/cmdline/apt-internal-solver.cc
+++ b/cmdline/apt-internal-solver.cc
@@ -19,6 +19,7 @@
#include <apt-pkg/algorithms.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/upgrade.h>
#include <unistd.h>
#include <cstdio>