diff --git a/powerpc-utils-cpu_diag_mode.patch b/powerpc-utils-cpu_diag_mode.patch
new file mode 100644
index 0000000..8a42648
--- /dev/null
+++ b/powerpc-utils-cpu_diag_mode.patch
@@ -0,0 +1,13 @@
+Index: powerpc-utils-1.2.2/src/ppc64_cpu.c
+===================================================================
+--- powerpc-utils-1.2.2.orig/src/ppc64_cpu.c	2009-10-22 14:00:13.000000000 -0500
++++ powerpc-utils-1.2.2/src/ppc64_cpu.c	2010-05-17 14:29:45.577267014 -0500
+@@ -383,7 +383,7 @@
+ 	} else {
+ 		signed char rmode = *run_mode;
+ 
+-		if (rmode < 0 || rmode > 3) {
++		if (rmode < '0' || rmode > '3') {
+ 			printf("Invalid run-mode=%c\n", rmode);
+ 			return -1;
+ 		}
diff --git a/powerpc-utils.spec b/powerpc-utils.spec
index 05385e3..da57f26 100644
--- a/powerpc-utils.spec
+++ b/powerpc-utils.spec
@@ -1,6 +1,6 @@
 Name:           powerpc-utils
 Version:        1.2.2
-Release:        2%{?dist}
+Release:        4%{?dist}
 Summary:        Utilities for PowerPC platforms
 
 Group:          System Environment/Base
@@ -16,7 +16,10 @@ Requires:       libservicelog
 ExclusiveArch:  ppc ppc64
 
 # This hack is needed only for platforms with autoconf < 2.63
-Patch2:		powerpc-utils-autoconf.patch
+Patch1:		powerpc-utils-autoconf.patch
+
+# correct the parameter checking when attempting to set the run mode
+Patch2:		powerpc-utils-cpu_diag_mode.patch
 
 # This is done before release of F12
 Obsoletes:      powerpc-utils-papr < 1.1.6-3
@@ -33,6 +36,8 @@ Utilities for PowerPC platforms.
 %patch1 -p1 -b .aconf
 %endif
 
+%patch2 -p1 -b .cpu_diag_mode
+
 %build
 ./bootstrap.sh
 %configure
@@ -109,6 +114,10 @@ rm -rf $RPM_BUILD_ROOT
 %preun
 
 %changelog
+* Wed Jun 02 2010 Roman Rakus <rrakus@redhat.com> - 1.2.2-4
+- correct the parameter checking when attempting to set the run mode
+- also bump release
+
 * Fri Mar 05 2010 Roman Rakus <rrakus@redhat.com> - 1.2.2-2
 - Removed deprecated init script and perl script