diff --git a/boinc/clientgui/AsyncRPC.cpp b/boinc/clientgui/AsyncRPC.cpp

index f196ced..1d3a70e 100644

--- a/boinc/clientgui/AsyncRPC.cpp

+++ b/boinc/clientgui/AsyncRPC.cpp

@@ -20,7 +20,7 @@

 #endif

 #if !(defined(_WIN32) || (defined(__WXMAC__) && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4)))

-#include <xlocale.h>

+#include <locale.h>

 #endif

 #include "stdwx.h"

diff --git a/boinc/lib/gui_rpc_client.h b/boinc/lib/gui_rpc_client.h

index fda40d0..bb9102a 100644

--- a/boinc/lib/gui_rpc_client.h

+++ b/boinc/lib/gui_rpc_client.h

@@ -807,7 +807,7 @@ struct RPC {

 #elif defined(__APPLE__) && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_4)

 // uselocale() is not available in OS 10.3.9 so use weak linking

-#include <xlocale.h>

+#include <locale.h>

 extern int		freelocale(locale_t) __attribute__((weak_import));

 extern locale_t	newlocale(int, __const char *, locale_t) __attribute__((weak_import));

 extern locale_t	uselocale(locale_t) __attribute__((weak_import));