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-rw-r--r--tools/aligncsv.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/aligncsv.cpp b/tools/aligncsv.cpp
index e65c2605..6e570e55 100644
--- a/tools/aligncsv.cpp
+++ b/tools/aligncsv.cpp
@@ -2,6 +2,8 @@
#include <cstdio>
#include <cstddef>
+#include <unistd.h>
+
#include <vector>
#include <string>