diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..42afabf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/build
\ No newline at end of file
diff --git a/testAllCachePolicy.cpp b/testAllCachePolicy.cpp
index 288f1bb..94d5f88 100644
--- a/testAllCachePolicy.cpp
+++ b/testAllCachePolicy.cpp
@@ -5,6 +5,7 @@
 #include <iomanip>
 #include <random>
 #include <algorithm>
+#include <array>
 
 #include "KICachePolicy.h"
 #include "KLfuCache.h"