--- core/fxge/dib/blend.cpp
+++ core/fxge/dib/blend.cpp
@@ -7,6 +7,7 @@
 #include "core/fxge/dib/blend.h"
 
 #include <algorithm>
+#include <cstdlib>
 
 #include "core/fxge/dib/fx_dib.h"
 #include "third_party/base/check_op.h"