diff --git a/systemtap-sdt.patch b/systemtap-sdt.patch
new file mode 100644
index 0000000..f933c85
--- /dev/null
+++ b/systemtap-sdt.patch
@@ -0,0 +1,30 @@
+From c02332052959e4213a59ce0ff40354f51506103a Mon Sep 17 00:00:00 2001
+From: Mark Wielaard <mjw@redhat.com>
+Date: Wed, 6 Jul 2011 23:07:51 +0200
+Subject: [PATCH] Silence sys/sdt.h comparison of unsigned expression < 0 is always false.
+
+Some arm g++ setups would complain about the wchar_t "signedness detection":
+sys/sdt.h:102: error: comparison of unsigned expression < 0 is always false
+
+jistone said: "((T)(-1) < 1)" would still get the right boolean value,
+and shouldn't trigger range errors like "unsigned is never < 0".
+---
+ includes/sys/sdt.h |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/includes/sys/sdt.h b/includes/sys/sdt.h
+index f7e1360..0a9fd40 100644
+--- a/includes/sys/sdt.h
++++ b/includes/sys/sdt.h
+@@ -77,7 +77,7 @@ struct __sdt_type
+ #define __SDT_ALWAYS_SIGNED(T) \
+ template<> struct __sdt_type<T> { static const bool __sdt_signed = true; };
+ #define __SDT_COND_SIGNED(T) \
+-template<> struct __sdt_type<T> { static const bool __sdt_signed = ((T)(-1) < 0); };
++template<> struct __sdt_type<T> { static const bool __sdt_signed = ((T)(-1) < 1); };
+ __SDT_ALWAYS_SIGNED(signed char)
+ __SDT_ALWAYS_SIGNED(short)
+ __SDT_ALWAYS_SIGNED(int)
+-- 
+1.7.3.4
+
diff --git a/systemtap.spec b/systemtap.spec
index ca462ef..9b38da8 100644
--- a/systemtap.spec
+++ b/systemtap.spec
@@ -16,7 +16,7 @@
 
 Name: systemtap
 Version: 1.5
-Release: 6%{?dist}
+Release: 7%{?dist}
 # for version, see also configure.ac
 Summary: Instrumentation System
 Group: Development/System
@@ -24,6 +24,8 @@ License: GPLv2+
 URL: http://sourceware.org/systemtap/
 Source: ftp://sourceware.org/pub/%{name}/releases/%{name}-%{version}.tar.gz
 
+Patch25: systemtap-sdt.patch
+
 Obsoletes: systemtap-client < 1.5
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@@ -183,6 +185,8 @@ find . \( -name configure -o -name config.h.in \) -print | xargs touch
 cd ..
 %endif
 
+%patch25 -p1
+
 %build
 
 %if %{with_bundled_elfutils}
@@ -498,6 +502,9 @@ exit 0
 
 
 %changelog
+* Fri Jul 15 2011 William Cohen <wcohen@redhat.com> - 1.5-7
+- Fix sdt.h to avoid warning on arm arches.
+
 * Mon Jul 11 2011 William Cohen <wcohen@redhat.com> - 1.5-6
 - there is no crash available on arm arches