1 files changed, 1 insertions, 0 deletions

diff --git a/ledger.cc b/ledger.cc
index 8a1a61ce..4883c3cb 100644
--- a/ledger.cc
+++ b/ledger.cc
@@ -1,6 +1,7 @@
 #include "ledger.h"
 
 #include <fstream>
+#include <unistd.h>
 
 namespace ledger {