diff --git a/src/wide_posix_api.cpp b/src/wide_posix_api.cpp
index 508acb32..8abb28e3 100644
--- a/src/wide_posix_api.cpp
+++ b/src/wide_posix_api.cpp
@@ -20,15 +20,15 @@
 
 #include <boost/regex/config.hpp>
 
-#ifndef BOOST_WORKAROUND
-#define BOOST_WORKAROUND(x, y) false
-#endif
-
 #ifndef BOOST_NO_WREGEX
 
 #include <boost/regex.hpp>
 #include <boost/cregex.hpp>
 
+#ifndef BOOST_WORKAROUND
+#define BOOST_WORKAROUND(x, y) false
+#endif
+
 #include <cstdio>
 #include <cstring>
 #include <cwchar>