diff --git a/pixel.cpp b/pixel.cpp
index 9c568bef0e8c07d3829673f0aabef85705c3fe08..deadc8633eea75cc937850862332bb1bb4c41fab 100644
--- a/pixel.cpp
+++ b/pixel.cpp
@@ -1,3 +1,4 @@
+#include <array>
 #include <stdio.h>
 #include <hls_stream.h>
 #include <ap_axi_sdata.h>