diff --git a/7126.patch b/7126.patch
new file mode 100644
index 0000000..72e0e64
--- /dev/null
+++ b/7126.patch
@@ -0,0 +1,77 @@
+From ea1355beae918b3acd67d5c0ccc44afbcc5b7ca9 Mon Sep 17 00:00:00 2001
+From: Edgar Gabriel <egabriel@central.uh.edu>
+Date: Tue, 29 Oct 2019 15:21:22 -0500
+Subject: [PATCH] fcoll/two_phase: fix error in calculating aggregators in
+ 32bit mode
+
+In fcoll_two_phase_supprot_fns.c: calculation of the aggregator index
+failed for large offsets on 32bit machine, due to improper handling of
+64bit offsets.
+
+Fixes Issue #7110
+
+Signed-off-by: Edgar Gabriel <egabriel@central.uh.edu>
+---
+ .../two_phase/fcoll_two_phase_support_fns.c   | 25 +++++++++++--------
+ 1 file changed, 14 insertions(+), 11 deletions(-)
+
+diff --git a/ompi/mca/fcoll/two_phase/fcoll_two_phase_support_fns.c b/ompi/mca/fcoll/two_phase/fcoll_two_phase_support_fns.c
+index 777cf08b9ae..69a56f2c6c7 100644
+--- a/ompi/mca/fcoll/two_phase/fcoll_two_phase_support_fns.c
++++ b/ompi/mca/fcoll/two_phase/fcoll_two_phase_support_fns.c
+@@ -10,7 +10,7 @@
+  *                         University of Stuttgart.  All rights reserved.
+  * Copyright (c) 2004-2005 The Regents of the University of California.
+  *                         All rights reserved.
+- * Copyright (c) 2008-2011 University of Houston. All rights reserved.
++ * Copyright (c) 2008-2019 University of Houston. All rights reserved.
+  * Copyright (c) 2014-2018 Research Organization for Information Science
+  *                         and Technology (RIST). All rights reserved.
+  * Copyright (c) 2015      Los Alamos National Security, LLC. All rights
+@@ -156,23 +156,26 @@ int mca_fcoll_two_phase_calc_aggregator(ompio_file_t *fh,
+ {
+ 
+ 
+-    int rank_index, rank;
++    int rank_index,  rank;
+     OMPI_MPI_OFFSET_TYPE avail_bytes;
+-
+-    rank_index = (int) ((off - min_off + fd_size)/ fd_size - 1);
+-
++    long long off_ll = (long long) off;
++    long long min_off_ll = (long long) min_off;
++    long long fd_size_ll = (long long) fd_size;
++    long long rank_index_ll;
++    
++    rank_index_ll = (((off_ll - min_off_ll + fd_size_ll)/ fd_size_ll) - 1);
++    rank_index = (int) rank_index_ll;
+     if (striping_unit > 0){
+ 	rank_index = 0;
+ 	while (off > fd_end[rank_index]) rank_index++;
+     }
+ 
+-
+     if (rank_index >= num_aggregators || rank_index < 0) {
+        fprintf(stderr,
+-	       "Error in ompi_io_ompio_calcl_aggregator():");
++	       "Error in mca_fcoll_two_phase_calc_aggregator:");
+        fprintf(stderr,
+-	       "rank_index(%d) >= num_aggregators(%d)fd_size=%lld off=%lld\n",
+-	       rank_index,num_aggregators,fd_size,off);
++	       "rank_index(%d) >= num_aggregators(%d) fd_size=%ld off=%ld min_off=%ld striping_unit=%d\n",
++	       rank_index, num_aggregators, fd_size, off, min_off, striping_unit);
+        ompi_mpi_abort(&ompi_mpi_comm_world.comm, 1);
+     }
+ 
+@@ -184,9 +187,9 @@ int mca_fcoll_two_phase_calc_aggregator(ompio_file_t *fh,
+ 
+     rank = aggregator_list[rank_index];
+ 
+-    #if 0
++#if 0
+     printf("rank : %d, rank_index : %d\n",rank, rank_index);
+-    #endif
++#endif
+ 
+     return rank;
+ }
diff --git a/openmpi.spec b/openmpi.spec
index 8aeff19..182b47b 100644
--- a/openmpi.spec
+++ b/openmpi.spec
@@ -33,7 +33,7 @@
 
 Name:            openmpi%{?_cc_name_suffix}
 Version:         4.0.2
-Release:         2%{?dist}
+Release:         3%{?dist}
 Summary:         Open Message Passing Interface
 License:         BSD and MIT and Romio
 URL:             http://www.open-mpi.org/
@@ -45,6 +45,9 @@ Source2:         openmpi.pth.py2
 Source3:         openmpi.pth.py3
 Source4:         macros.openmpi
 
+# fcoll/two_phase: fix error in calculating aggregators in 32bit mode
+Patch0:          https://patch-diff.githubusercontent.com/raw/open-mpi/ompi/pull/7126.patch
+
 BuildRequires:   gcc-c++
 BuildRequires:   gcc-gfortran
 BuildRequires:   valgrind-devel
@@ -356,6 +359,9 @@ make check
 
 
 %changelog
+* Sun Nov 24 2019 Orion Poplawski <orion@nwra.com> - 4.0.2-3
+- Add upstream fix for error in calculating aggregators in 32bit mode
+
 * Fri Nov 15 2019 Orion Poplawski <orion@nwra.com> - 4.0.2-2
 - Drop python2 for Fedora 32+ (bz#1773125)