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-rw-r--r--src/uint256.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/uint256.h b/src/uint256.h
index 104b84970a..9966a14ed7 100644
--- a/src/uint256.h
+++ b/src/uint256.h
@@ -6,6 +6,7 @@
#define BITCOIN_UINT256_H
#include <limits.h>
+#include <stdio.h>
#include <string.h>
#include <string>
#include <vector>