diff --git a/src/cregex.cpp b/src/cregex.cpp
index 64811a03..e1f9aa40 100644
--- a/src/cregex.cpp
+++ b/src/cregex.cpp
@@ -19,8 +19,8 @@
 
 #define BOOST_REGEX_SOURCE
 
-#include <boost/cregex.hpp>
 #include <boost/regex.hpp>
+#include <boost/cregex.hpp>
 #if !defined(BOOST_NO_STD_STRING)
 #include <map>
 #include <list>
diff --git a/src/posix_api.cpp b/src/posix_api.cpp
index f1a8b87e..6383fa48 100644
--- a/src/posix_api.cpp
+++ b/src/posix_api.cpp
@@ -19,8 +19,8 @@
 #define BOOST_REGEX_SOURCE
 
 #include <cstdio>
-#include <boost/cregex.hpp>
 #include <boost/regex.hpp>
+#include <boost/cregex.hpp>
 
 #if defined(BOOST_NO_STDC_NAMESPACE)
 namespace std{
diff --git a/src/wide_posix_api.cpp b/src/wide_posix_api.cpp
index 67675620..78252819 100644
--- a/src/wide_posix_api.cpp
+++ b/src/wide_posix_api.cpp
@@ -22,8 +22,8 @@
 
 #ifndef BOOST_NO_WREGEX
 
-#include <boost/cregex.hpp>
 #include <boost/regex.hpp>
+#include <boost/cregex.hpp>
 
 #include <cwchar>
 #include <cstring>