diff --git a/configure b/configure
index 8469354d8d..8afa83e0f2 100755
--- a/configure
+++ b/configure
@@ -10531,7 +10531,7 @@ fi
 echo "$ac_t""$wx_cv_sizeof_wchar_t" 1>&6
 
 cat >> confdefs.h <<EOF
-#define wxSIZEOF_WCHAR_T $wx_cv_sizeof_wchar_t
+#define SIZEOF_WCHAR_T $wx_cv_sizeof_wchar_t
 EOF
 
 
diff --git a/configure.in b/configure.in
index af395b8710..af88db8f9b 100644
--- a/configure.in
+++ b/configure.in
@@ -2353,7 +2353,7 @@ AC_CACHE_CHECK([size of wchar_t], wx_cv_sizeof_wchar_t,
 	)
 ])
 
-AC_DEFINE_UNQUOTED(wxSIZEOF_WCHAR_T, $wx_cv_sizeof_wchar_t)
+AC_DEFINE_UNQUOTED(SIZEOF_WCHAR_T, $wx_cv_sizeof_wchar_t)
 
 
 dnl for bytesex stuff (don't use AC_C_BIGENDIAN to allow cross-compiling)