diff --git a/source/convert_from.cc b/source/convert_from.cc
index 363edc252..4a3e1c436 100644
--- a/source/convert_from.cc
+++ b/source/convert_from.cc
@@ -10,8 +10,6 @@
 
 #include "libyuv/convert_from.h"
 
-#include <stddef.h>
-
 #include "libyuv/basic_types.h"
 #include "libyuv/convert.h"  // For I420Copy
 #include "libyuv/cpu_id.h"
diff --git a/source/rotate_common.cc b/source/rotate_common.cc
index ad420489c..899405651 100644
--- a/source/rotate_common.cc
+++ b/source/rotate_common.cc
@@ -8,8 +8,6 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include <stddef.h>
-
 #include "libyuv/rotate_row.h"
 #include "libyuv/row.h"
 
diff --git a/source/row_any.cc b/source/row_any.cc
index 88bf7496b..20371c173 100644
--- a/source/row_any.cc
+++ b/source/row_any.cc
@@ -10,7 +10,6 @@
 
 #include "libyuv/row.h"
 
-#include <stddef.h>
 #include <string.h>  // For memset.
 
 #include "libyuv/basic_types.h"