diff --git a/commands.cpp b/commands.cpp
index 9d782d6..4f2fd04 100644
--- a/commands.cpp
+++ b/commands.cpp
@@ -22,6 +22,7 @@
 #include "util.hpp"
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <unistd.h>
 #include <stdint.h>
 #include <algorithm>
 #include <string>