diff --git a/README b/README
index 3b28549b86d..2e172ada0b9 100644
--- a/README
+++ b/README
@@ -188,6 +188,18 @@ Compiler Notes
   for more details:
   https://github.com/open-mpi/ompi/issues/3612
 
+- MPI applications that use the mpi_f08 module on PowerPC platforms
+  (tested ppc64le) will likely experience runtime failures if:
+   - they are using a GNU linker (ld) version after v2.25.1 and before v2.28,
+     -and-
+   - they compiled with PGI (tested 17.5) or XL (tested v15.1.5) compilers.
+  This was noticed on Ubuntu 16.04 which uses the 2.26.1 version of ld by
+  default. However, this issue impacts any OS using a version of ld noted
+  above. This GNU linker regression will be fixed in version 2.28.
+  Below is a link to the GNU bug on this issue:
+    https://sourceware.org/bugzilla/show_bug.cgi?id=21306
+  The XL compiler will include a fix for this issue in a future release.
+
 - On NetBSD-6 (at least AMD64 and i386), and possibly on OpenBSD,
   libtool misidentifies properties of f95/g95, leading to obscure
   compile-time failures if used to build Open MPI.  You can work