diff --git a/openucx-s390x-support.patch b/openucx-s390x-support.patch
index f1ba789..e132404 100644
--- a/openucx-s390x-support.patch
+++ b/openucx-s390x-support.patch
@@ -1,4 +1,4 @@
-commit a8b24a8cd4124e3ffb7b682b94b3a1192e48c9c7
+commit b47dad27703f0b59072f5a8d8fba99c1d173f8f0
 Author: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
 Date:   Thu Aug 9 07:41:24 2018 +0200
 
@@ -407,3 +407,27 @@ index 000000000000..225e4e5e896a
 +
 +#endif
 +
+diff --git src/ucs/sys/sys.c src/ucs/sys/sys.c
+index 62e555b409d1..8adc26241781 100644
+--- src/ucs/sys/sys.c
++++ src/ucs/sys/sys.c
+@@ -1134,8 +1134,19 @@ void *ucs_sys_realloc(void *old_ptr, size_t old_length, size_t new_length)
+     if (old_ptr == NULL) {
+         /* Note: Must pass the 0 offset as "long", otherwise it will be
+          * partially undefined when converted to syscall arguments */
++#if defined(__s390x__)
++		long int _args[6] = {
++			(long int) NULL,
++			(long int) new_length,
++			(long int) PROT_READ|PROT_WRITE,
++			(long int) MAP_PRIVATE|MAP_ANONYMOUS,
++			(long int) -1,
++			(long int) 0ul};
++        ptr = (void*)syscall(__NR_mmap, _args);
++#else
+         ptr = (void*)syscall(__NR_mmap, NULL, new_length, PROT_READ|PROT_WRITE,
+                              MAP_PRIVATE|MAP_ANONYMOUS, -1, 0ul);
++#endif
+         if (ptr == MAP_FAILED) {
+             ucs_log_fatal_error("mmap(NULL, %zu, READ|WRITE, PRIVATE|ANON) failed: %m",
+                                 new_length);
diff --git a/openucx.changes b/openucx.changes
index 2e519a5..fe40666 100644
--- a/openucx.changes
+++ b/openucx.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Feb 24 16:34:54 UTC 2021 - Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
+
+- Update openucx-s390x-support.patch to fix mmap syscall on s390x (bsc#1182691)
+
 -------------------------------------------------------------------
 Mon Oct  5 13:21:34 UTC 2020 - Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
 
diff --git a/openucx.spec b/openucx.spec
index 0b4b4e0..5734bd5 100644
--- a/openucx.spec
+++ b/openucx.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package openucx
 #
-# Copyright (c) 2020 SUSE LLC
+# Copyright (c) 2021 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -154,7 +154,7 @@ export UCX_CFLAGS="$UCX_CFLAGS -mno-sse -mno-sse2"
 		 --disable-debug --disable-assertions \
 		 --disable-params-check \
 		 --with-rc --with-ud --with-dc \
-		 --with-mlx5-dv --with-rdmacm 
+		 --with-mlx5-dv --with-rdmacm
 
 # Override BASE_CFLAGS to disable Werror (boo#1121267)
 make %{?_smp_mflags} V=1 BASE_CFLAGS="-g -Wall"