diff --git a/include/sta/ArrayTable.hh b/include/sta/ArrayTable.hh
index 9b438233..547fc91d 100644
--- a/include/sta/ArrayTable.hh
+++ b/include/sta/ArrayTable.hh
@@ -9,6 +9,8 @@
 #ifndef STA_ARRAY_TABLE_H
 #define STA_ARRAY_TABLE_H
 
+#include <string.h> // memcpy
+
 #include "Vector.hh"
 #include "ObjectId.hh"