diff --git a/suitesparse.spec b/suitesparse.spec
index 3a2ef1a..0b4e06f 100644
--- a/suitesparse.spec
+++ b/suitesparse.spec
@@ -12,7 +12,7 @@
 
 Name:           suitesparse
 Version:        4.3.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        A collection of sparse matrix libraries
 
 Group:          System Environment/Libraries
@@ -28,7 +28,7 @@ BuildRequires:  atlas-devel >= 3.10
 %else
 BuildRequires:  atlas-devel
 %endif
-%ifarch %{ix86} x86_64 ia64
+%ifnarch s390 s390x
 BuildRequires:  tbb-devel
 %global with_tbb 1
 %endif
@@ -441,6 +441,9 @@ rm -rf ${RPM_BUILD_ROOT}
 %doc Doc/*
 
 %changelog
+* Tue Oct 14 2014 Peter Robinson <pbrobinson@fedoraproject.org> 4.3.1-4
+- Only s390 doesn't have tbb
+
 * Mon Sep 15 2014 Orion Poplawski <orion@cora.nwra.com> - 4.3.1-3
 - Change patch to move math.h include into SuiteSparse_config.c
 - Fix linkage and library file permission issues