diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 169eda7f6864..8dbd948adcc8 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -48,6 +48,8 @@ On Windows only, Boost filesystem is needed at version 1.48, for boost::locale.
 The boost filesystem dep may be disabled, if compiling with scons, by passing it an argument. Then it will compile using the legacy filesystem code. (This may not be maintained in the long term, however.)
 
 (The new SDL_mixer requirement cannot be similarly disabled.)
+
+For those of you compiling Wesnoth on OS X using Xcode, this means that you need to download a new version of wesnoth_compile_mac_1.13.zip.
 [/section]
 
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