diff --git a/clientgui/AsyncRPC.cpp b/clientgui/AsyncRPC.cpp
index f196ced8b1..47de6a9430 100644
--- a/clientgui/AsyncRPC.cpp
+++ b/clientgui/AsyncRPC.cpp
@@ -19,7 +19,7 @@
 #pragma implementation "AsyncRPC.h"
 #endif
 
-#if !(defined(_WIN32) || (defined(__WXMAC__) && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4)))
+#if HAVE_XLOCALE_H
 #include <xlocale.h>
 #endif