diff --git a/llvm/docs/GlobalISel/GenericOpcode.rst b/llvm/docs/GlobalISel/GenericOpcode.rst
index 2350b9cf376451..33611ea31a357f 100644
--- a/llvm/docs/GlobalISel/GenericOpcode.rst
+++ b/llvm/docs/GlobalISel/GenericOpcode.rst
@@ -152,9 +152,11 @@ Convert a pointer to an integer.
 G_BITCAST
 ^^^^^^^^^
 
-Reinterpret a value as a new type. This is usually done without changing any
-bits but this is not always the case due a sublety in the definition of the
-:ref:`LLVM-IR Bitcast Instruction <i_bitcast>`.
+Reinterpret a value as a new type. This is usually done without
+changing any bits but this is not always the case due a sublety in the
+definition of the :ref:`LLVM-IR Bitcast Instruction <i_bitcast>`. It
+is allowed to bitcast between pointers with the same size, but
+different address spaces.
 
 .. code-block:: none