diff --git a/frysk.spec b/frysk.spec
index e1d63fa..481673a 100644
--- a/frysk.spec
+++ b/frysk.spec
@@ -1,7 +1,7 @@
 Summary:	Execution analysis and debugging tool-suite.
 Name:		frysk
 Version:	0.4
-Release:	30%{?dist}
+Release:	31%{?dist}
 
 # antlrv2 is Public Domain; antlrv3 is BSD.
 # getopt is GPLv2 with exception
@@ -93,8 +93,8 @@ BuildRequires:	elfutils-devel >= 0.151
 # Bug #416961: ALPHA not supported by frysk and libunwind.
 # Bug #467970: SPARC/SPARC64 not supported by frysk and libunwind.
 # Bug #467971: ARM not supported by frysk.
-# Bug #506961: S390X not supported by frysk and libunwind.
-ExcludeArch: alpha arm ppc sparc sparc64 s390x
+# Bug #506961: S390(X) not supported by frysk and libunwind.
+ExclusiveArch: %{ix86} x86_64 ppc64
 
 # We do not want to build a ``cross-debugging version'' i686->i386;
 # libunwind build would get confused by this.  Override the cmd-line
@@ -370,6 +370,9 @@ rm -rf %{buildroot}
 %{_mandir}/man1/frysk.1.gz
 
 %changelog
+* Fri Mar 11 2011 Dan Horák <dan[at]danny.cz> - 0.4-31
+- switch to ExclusiveArch
+
 * Tue Feb 08 2011 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.4-30
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_15_Mass_Rebuild