diff --git a/docs/quickstart.md b/docs/quickstart.md
index 1b0392125..dee8fa8d1 100644
--- a/docs/quickstart.md
+++ b/docs/quickstart.md
@@ -13,7 +13,7 @@ starting development using TCMalloc at least run through this quick tutorial.
 
 Running the code within this tutorial requires:
 
-*   A compatible platform (E.g. Linux). Consult the [Platforms Guide](platforms)
+*   A compatible platform (E.g. Linux). Consult the [Platforms Guide](https://github.com/google/tcmalloc/blob/master/docs/platforms.md)
     for more information.
 *   A compatible C++ compiler *supporting at least C++17*. Most major compilers
     are supported.