diff --git a/README.md b/README.md
index e2f72a8..1190844 100644
--- a/README.md
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@@ -3,6 +3,8 @@
 Snappy is a light-weight layout framework which wraps AutoLayout with a nicer syntax. Snappy has its own layout DSL which provides a chainable way of describing your NSLayoutConstraints which results in layout code that is more concise and readable.
 Snappy supports iOS and Mac OS X.
 
+> Snappy uses some Swift only features like function overloading it cannot be used from Objective-C. Because of this we’ve chosen to swap prefixes from Masonry’s `mas_` to `snp_` so you can use both Masonry and Snappy in the same project.
+
 ## What's wrong with NSLayoutConstraints?
 
 Under the hood Auto Layout is a powerful and flexible way of organising and laying out your views. However creating constraints from code is verbose and not very descriptive.