diff --git a/rdma-core-s390x.patch b/rdma-core-s390x.patch
new file mode 100644
index 0000000..304a5b4
--- /dev/null
+++ b/rdma-core-s390x.patch
@@ -0,0 +1,12 @@
+diff --git util/udma_barrier.h util/udma_barrier.h
+index 9932a687..23acf233 100644
+--- util/udma_barrier.h
++++ util/udma_barrier.h
+@@ -192,6 +192,7 @@
+ #define mmio_flush_writes() asm volatile("dsb st" ::: "memory");
+ #elif defined(__sparc__) || defined(__s390x__)
+ #define mmio_flush_writes() asm volatile("" ::: "memory")
++#else
+ #error No architecture specific memory barrier defines found!
+ #endif
+ 
diff --git a/rdma-core.changes b/rdma-core.changes
index 2d3fe98..87840ae 100644
--- a/rdma-core.changes
+++ b/rdma-core.changes
@@ -1,6 +1,7 @@
 -------------------------------------------------------------------
-Tue Jun  6 12:12:05 UTC 2017 - nmoreychaisemartin@suse.com
+Wed Jun  7 13:02:09 UTC 2017 - nmoreychaisemartin@suse.com
 
+- Add patch rdma-core-s390x.patch to fix s390x build (bsc#1043105).
 - libibverbs1 requires libibverbs (bsc#1042840).
 
 -------------------------------------------------------------------
diff --git a/rdma-core.spec b/rdma-core.spec
index dcd33bc..bd10620 100644
--- a/rdma-core.spec
+++ b/rdma-core.spec
@@ -46,6 +46,7 @@ Group:          Productivity/Networking/Other
 Url:            https://github.com/linux-rdma/rdma-core
 Source0:        %{name}-%{version}%{git_ver}.tar.xz
 Source1:        baselibs.conf
+Patch1:         rdma-core-s390x.patch
 BuildRequires:  binutils
 BuildRequires:  cmake >= 2.8.11
 BuildRequires:  gcc
@@ -104,7 +105,7 @@ Requires:       %{ibcm_lname} = %{version}-%{release}
 Requires:       %{rdmacm_lname} = %{version}-%{release}
 Requires:       %{umad_lname} = %{version}-%{release}
 Requires:       %{verbs_lname} = %{version}-%{release}
-%ifnarch s390 s390x armv7hl
+%ifnarch s390 armv7hl
 Requires:       %{mlx5_lname} = %{version}-%{release}
 %endif
 Requires:       rsocket = %{version}-%{release}
@@ -153,7 +154,7 @@ Provides:       libocrdma-rdmav2 = %{version}-%{release}
 Obsoletes:      libocrdma-rdmav2 < %{version}-%{release}
 Provides:       librxe-rdmav2 = %{version}-%{release}
 Obsoletes:      librxe-rdmav2 < %{version}-%{release}
-%ifnarch s390 s390x armv7hl
+%ifnarch s390 armv7hl
 Requires:       %{mlx5_lname} = %{version}-%{release}
 %endif
 
@@ -181,12 +182,12 @@ Device-specific plug-in ibverbs userspace drivers are included:
 %package -n %verbs_lname
 Summary:        Ibverbs runtime library
 Group:          System/Libraries
-Requires:       libibverbs = %{version}-%{release}
+Requires:       libibverbs = %{version}
 
 %description -n %verbs_lname
 This package contains the ibverbs runtime library.
 
-%ifnarch s390 s390x armv7hl
+%ifnarch s390 armv7hl
 %package -n %mlx5_lname
 Summary:        MLX5 runtime library
 Group:          System/Libraries
@@ -297,6 +298,7 @@ on those changes.
 
 %prep
 %setup -q -n  %{name}-%{version}%{git_ver}
+%patch1
 
 %build
 
@@ -383,7 +385,7 @@ rm  %{buildroot}%{_sbindir}/srp_daemon.sh
 %post -n %verbs_lname -p /sbin/ldconfig
 %postun -n %verbs_lname -p /sbin/ldconfig
 
-%ifnarch s390 s390x armv7hl
+%ifnarch s390 armv7hl
 %post -n %mlx5_lname -p /sbin/ldconfig
 %postun -n %mlx5_lname -p /sbin/ldconfig
 %endif
@@ -501,7 +503,7 @@ rm  %{buildroot}%{_sbindir}/srp_daemon.sh
 %{_mandir}/man3/umad*
 %{_mandir}/man3/*_to_ibv_rate.*
 %{_mandir}/man7/rdma_cm.*
-%ifnarch s390 s390x armv7hl
+%ifnarch s390 armv7hl
 %{_mandir}/man3/mlx5*
 %{_mandir}/man7/mlx5*
 %endif
@@ -522,7 +524,7 @@ rm  %{buildroot}%{_sbindir}/srp_daemon.sh
 %defattr(-,root,root)
 %{_libdir}/libibverbs*.so.*
 
-%ifnarch s390 s390x armv7hl
+%ifnarch s390 armv7hl
 %files -n %mlx5_lname
 %defattr(-,root,root)
 %{_libdir}/libmlx5*.so.*