diff --git a/src/doc/rustc-guide b/src/doc/rustc-guide
index 941968db2fd9c..ab4978cb3b20b 160000
--- a/src/doc/rustc-guide
+++ b/src/doc/rustc-guide
@@ -1 +1 @@
-Subproject commit 941968db2fd9c85788a4f971c8e425d46b4cb734
+Subproject commit ab4978cb3b20b7f48d3c18a941f158ba142e9668