diff --git a/openmp/docs/SupportAndFAQ.rst b/openmp/docs/SupportAndFAQ.rst
--- a/openmp/docs/SupportAndFAQ.rst
+++ b/openmp/docs/SupportAndFAQ.rst
@@ -329,3 +329,17 @@
 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. libomptarget and plugins are now built as LLVM libraries starting from LLVM
+15. Because LLVM libraries are not backward compatible, libomptarget and plugins
+are not as well. Given that fact, the interfaces between 1) the Clang compiler
+and libomptarget, 2) the Clang compiler and device runtime library, and
+3) libomptarget and plugins are not guaranteed to be compatible with an earlier
+version. Users are responsible for ensuring compatibility when not using the
+Clang compiler and runtime libraries from the same build. Nevertheless, in order
+to better support third-party libraries and toolchains that depend on existing
+libomptarget entry points, contributors are discouraged from making
+modifications to them.