diff --git a/src/common/arrstr.cpp b/src/common/arrstr.cpp
index bfc4d88981..ace83a6712 100644
--- a/src/common/arrstr.cpp
+++ b/src/common/arrstr.cpp
@@ -21,13 +21,12 @@
 #endif
 
 #include "wx/arrstr.h"
+#include "wx/thread.h" 
 
 // ============================================================================
 // ArrayString
 // ============================================================================
 
-#include "wx/arrstr.h"
-
 wxArrayString::wxArrayString(size_t sz, const wxChar** a)
 {
 #if !wxUSE_STL