diff --git a/pixel.cpp b/pixel.cpp
index 716b555a36c7db8dbda82880a7f2c60238f2fc55..d8eda7056932f9bf77add599b80724761419afd7 100644
--- a/pixel.cpp
+++ b/pixel.cpp
@@ -1,4 +1,4 @@
-#include <iostream>
+#include <stdio.h>
 #include <hls_stream.h>
 #include <ap_axi_sdata.h>
 #include<math.h>