diff --git a/mkvparser.cpp b/mkvparser.cpp
index 431a669..b63f905 100644
--- a/mkvparser.cpp
+++ b/mkvparser.cpp
@@ -7,11 +7,12 @@
 // be found in the AUTHORS file in the root of the source tree.
 
 #include "mkvparser.hpp"
+
 #include <cassert>
-#include <cstring>
-#include <new>
 #include <climits>
 #include <cmath>
+#include <cstring>
+#include <new>
 
 #ifdef _MSC_VER
 // Disable MSVC warnings that suggest making code non-portable.
diff --git a/mkvparser.hpp b/mkvparser.hpp
index 20259eb..d69fae2 100644
--- a/mkvparser.hpp
+++ b/mkvparser.hpp
@@ -9,9 +9,9 @@
 #ifndef MKVPARSER_HPP
 #define MKVPARSER_HPP
 
-#include <cstdlib>
-#include <cstdio>
 #include <cstddef>
+#include <cstdio>
+#include <cstdlib>
 
 namespace mkvparser {