diff --git a/ompi/mpi/fortran/use-mpi-f08/profile/Makefile.am b/ompi/mpi/fortran/use-mpi-f08/profile/Makefile.am
index 4f0baa82680..bd11ded4657 100644
--- a/ompi/mpi/fortran/use-mpi-f08/profile/Makefile.am
+++ b/ompi/mpi/fortran/use-mpi-f08/profile/Makefile.am
@@ -28,6 +28,13 @@
 
 include $(top_srcdir)/Makefile.ompi-rules
 
+# Note that Automake's Fortran-buidling rules uses CPPFLAGS and
+# AM_CPPFLAGS.  This can cause weirdness (e.g.,
+# https://github.com/open-mpi/ompi/issues/7253).  Let's just zero
+# those out and rely on AM_FCFLAGS.
+CPPFLAGS =
+AM_CPPFLAGS =
+
 # This Makefile is only relevant if we're building the "use mpi_f08"
 # MPI bindings.
 if OMPI_BUILD_FORTRAN_USEMPIF08_BINDINGS
diff --git a/ompi/mpiext/example/use-mpi-f08/Makefile.am b/ompi/mpiext/example/use-mpi-f08/Makefile.am
index f495b4414d6..ef2ddd79d13 100644
--- a/ompi/mpiext/example/use-mpi-f08/Makefile.am
+++ b/ompi/mpiext/example/use-mpi-f08/Makefile.am
@@ -2,6 +2,7 @@
 # Copyright (c) 2011-2012 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2017      Research Organization for Information Science
 #                         and Technology (RIST). All rights reserved.
+# Copyright (c) 2022      IBM Corporation.  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -9,6 +10,14 @@
 # $HEADER$
 #
 
+# Note that Automake's Fortran-buidling rules uses CPPFLAGS and
+# AM_CPPFLAGS.  This can cause weirdness (e.g.,
+# https://github.com/open-mpi/ompi/issues/7253 and
+# https://github.com/open-mpi/ompi/issues/9716).  Let's just zero
+# those out and rely on AM_FCFLAGS.
+CPPFLAGS =
+AM_CPPFLAGS =
+
 # This file builds the use_mpi_f08-based bindings for MPI extensions.  It
 # is optional in MPI extensions.
 
diff --git a/ompi/mpiext/ftmpi/use-mpi-f08/Makefile.am b/ompi/mpiext/ftmpi/use-mpi-f08/Makefile.am
index d06c0aa6837..075bd2fbe12 100644
--- a/ompi/mpiext/ftmpi/use-mpi-f08/Makefile.am
+++ b/ompi/mpiext/ftmpi/use-mpi-f08/Makefile.am
@@ -6,6 +6,7 @@
 # Copyright (c) 2018      The University of Tennessee and The University
 #                         of Tennessee Research Foundation.  All rights
 #                         reserved.
+# Copyright (c) 2022      IBM Corporation.  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -13,6 +14,14 @@
 # $HEADER$
 #
 
+# Note that Automake's Fortran-buidling rules uses CPPFLAGS and
+# AM_CPPFLAGS.  This can cause weirdness (e.g.,
+# https://github.com/open-mpi/ompi/issues/7253 and
+# https://github.com/open-mpi/ompi/issues/9716).  Let's just zero
+# those out and rely on AM_FCFLAGS.
+CPPFLAGS =
+AM_CPPFLAGS =
+
 # This file builds the use_mpi_f08-based bindings for MPI extensions.  It
 # is optional in MPI extensions.