diff --git a/doc/tutorials/introduction.md b/doc/tutorials/introduction.md
index e15a18010e..351f57b134 100644
--- a/doc/tutorials/introduction.md
+++ b/doc/tutorials/introduction.md
@@ -16,7 +16,7 @@ It is also designed such that major new features, such as displaying 3D maps, or
 OL3 is based on Google's Closure Tools. It makes heavy use of parts of the [__Closure Library__](https://developers.google.com/closure/library/). Using this to handle basics like DOM or event handling means the developers can concentrate on mapping functionality, and be sure that the underlying software is well-tested and cross-browser. Closure Library is specially designed to be optimized by the [__Closure Compiler__](https://developers.google.com/closure/compiler/). The 'advanced' optimizations that this provides offers a level of compression that far exceeds anything else available. OL3 has been designed to make full use of this.
 
 ## Public API
-Using the advanced optimizations of the Closure Compiler means that properties and methods are renamed – `longMeaningfulName` might become `xB` – and so are effectively unusable in applications using the library. To be usable, they have to be explicitly `exported`. This means the exported names, those not renamed, effectively become the public API of the library. These __exportable__ properties and methods are marked in the source, and documented in the [API docs](../apidoc). This is the officially supported API of the library. A build containing all these exportable names is known as a __full build__. A hosted version of this is available, which can be used by any application.
+Using the advanced optimizations of the Closure Compiler means that properties and methods are renamed – `longMeaningfulName` might become `xB` – and so are effectively unusable in applications using the library. To be usable, they have to be explicitly `exported`. This means the exported names, those not renamed, effectively become the public API of the library. These __exportable__ properties and methods are marked in the source, and documented in the [API docs](../../apidoc). This is the officially supported API of the library. A build containing all these exportable names is known as a __full build__. A hosted version of this is available, which can be used by any application.
 
 Although Closure library functions are widely used within OL3, none of them are exported. You will see references to them (they are all in the `goog` namespace) in the API docs, but these are for information only. You can use the Closure library in your own applications if you like, but this is not required.