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-rw-r--r--libqpdf/QPDF_encryption.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/libqpdf/QPDF_encryption.cc b/libqpdf/QPDF_encryption.cc
index b6a035ef..23284809 100644
--- a/libqpdf/QPDF_encryption.cc
+++ b/libqpdf/QPDF_encryption.cc
@@ -14,6 +14,7 @@
#include <qpdf/RC4.hh>
#include <qpdf/MD5.hh>
+#include <algorithm>
#include <assert.h>
#include <string.h>