diff --git a/openmp/docs/SupportAndFAQ.rst b/openmp/docs/SupportAndFAQ.rst
--- a/openmp/docs/SupportAndFAQ.rst
+++ b/openmp/docs/SupportAndFAQ.rst
@@ -329,3 +329,12 @@
 stack memory during execution and crash. The environment variable
 ``LIBOMPTARGET_STACK_SIZE`` can be used to increase the stack size if this
 occurs.
+
+Q: Are libomptarget and plugins backward compatible?
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+No. Since libomptarget and plugins are now built as LLVM libraries starting from
+LLVM 15, they are no longer backward compatible. Given that fact, both libomptarget
+and plugin interfaces are not guaranteed to be compatible as well. It is always
+recommended to use the Clang compiler and runtime libraries from the same build.
+If not, it is up to users to make sure the compatibility.