diff --git a/include/config-win.h b/include/config-win.h
index 66a441ec339..472190e53ca 100644
--- a/include/config-win.h
+++ b/include/config-win.h
@@ -402,4 +402,5 @@ inline double ulonglong2double(ulonglong value)
 #define HAVE_CHARSET_ucs2 1
 #define HAVE_CHARSET_ujis 1
 #define HAVE_CHARSET_utf8 1
+#define HAVE_UCA_COLLATIONS 1