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-rw-r--r--src/lib/filters/data_snk.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/lib/filters/data_snk.cpp b/src/lib/filters/data_snk.cpp
index cdde5ffa1..9f0ddff96 100644
--- a/src/lib/filters/data_snk.cpp
+++ b/src/lib/filters/data_snk.cpp
@@ -9,6 +9,7 @@
#include <botan/data_snk.h>
#include <botan/exceptn.h>
+#include <ostream>
#if defined(BOTAN_TARGET_OS_HAS_FILESYSTEM)
#include <fstream>