diff --git a/folly/test/UtilityTest.cpp b/folly/test/UtilityTest.cpp
index ec8c7422fe3..d5e1c906c02 100644
--- a/folly/test/UtilityTest.cpp
+++ b/folly/test/UtilityTest.cpp
@@ -16,6 +16,7 @@
 
 #include <folly/Utility.h>
 
+#include <array>
 #include <type_traits>
 
 #include <folly/lang/Keep.h>