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-rw-r--r--tests/include/unittest.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/include/unittest.hh b/tests/include/unittest.hh
index 7c65f9f..3ce4f38 100644
--- a/tests/include/unittest.hh
+++ b/tests/include/unittest.hh
@@ -16,7 +16,7 @@
#include <iostream>
#include <iomanip>
#include <cstdlib>
-
+#include <string>
std::ostream & print_hex(
std::ostream & os,