diff --git a/documentation/migration-guides/migration-5.2.rst b/documentation/migration-guides/migration-5.2.rst
index e9de6910e..245c22f28 100644
--- a/documentation/migration-guides/migration-5.2.rst
+++ b/documentation/migration-guides/migration-5.2.rst
@@ -94,6 +94,29 @@ systemd changes
    not for socket files).
    Now all service files must be explicitly added to :term:`FILES`.
 
+Multiconfig changes
+~~~~~~~~~~~~~~~~~~~
+
+-  The value of ``BB_CURRENT_MC`` was changed from ``default`` to an empty string
+   for the default multiconfig configuration to avoid needing to map the values
+   within BitBake. This was already not happening in some cases so this fixes
+   some obscure bugs.
+
+Virtual toolchain provider changes
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+-  Support was added for virtual providers on a per-recipe basis for specific
+   key toolchain providers listed in ``BB_VIRTUAL_RECIPE_PROVIDERS``. As part of
+   that support, the ``cross`` providers were simplified to remove the triplet
+   prefix and generalise the naming, so for example::
+
+      virtual/${TARGET_PREFIX}-binutils -> virtual/cross-bintuils
+      virtual/${TARGET_PREFIX}-gcc -> virtual/cross-cc
+      virtual/${TARGET_PREFIX}-g++ -> virtual/cross-c++
+      virtual/${TARGET_PREFIX}-compilerlibs -> virtual/compilerlibs
+      virtual/${SDK_PREFIX}-binutils -> virtual/nativesdk-cross-binutils
+      virtual/${SDK_PREFIX}-gcc -> virtual/nativesdk-cross-cc
+
 Recipe changes
 ~~~~~~~~~~~~~~