diff --git a/tgfx/include/core/Matrix.h b/tgfx/include/core/Matrix.h
index 8c18072d3a..e24f6474e6 100644
--- a/tgfx/include/core/Matrix.h
+++ b/tgfx/include/core/Matrix.h
@@ -18,6 +18,7 @@
 
 #pragma once
 
+#include <cstring>
 #include "core/Rect.h"
 
 namespace tgfx {
diff --git a/tgfx/src/core/Data.cpp b/tgfx/src/core/Data.cpp
index 5ba1d50556..048ff93d68 100644
--- a/tgfx/src/core/Data.cpp
+++ b/tgfx/src/core/Data.cpp
@@ -17,6 +17,7 @@
 /////////////////////////////////////////////////////////////////////////////////////////////////
 
 #include "core/Data.h"
+#include <cstring>
 #include "core/Stream.h"
 
 namespace tgfx {