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-rw-r--r--src/timer_state.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/timer_state.cc b/src/timer_state.cc
index 7700f80..ecaed77 100644
--- a/src/timer_state.cc
+++ b/src/timer_state.cc
@@ -13,6 +13,7 @@
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/types.h>
+#include <unistd.h>
#include <thread>
namespace {