diff --git a/src/common/string.cpp b/src/common/string.cpp
index 42c3a74f40..42863abaa8 100644
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -1755,6 +1755,8 @@ wxString& wxString::replace(size_t nStart, size_t nLen,
 
 #if !wxUSE_STL
 
+#include "wx/arrstr.h"
+
 // size increment = min(50% of current size, ARRAY_MAXSIZE_INCREMENT)
 #define   ARRAY_MAXSIZE_INCREMENT       4096