diff --git a/papi-rmb.patch b/papi-rmb.patch
new file mode 100644
index 0000000..78525aa
--- /dev/null
+++ b/papi-rmb.patch
@@ -0,0 +1,31 @@
+From 4375fe0bd76f6a05c93c3334f8f2ab7aaa7d29f4 Mon Sep 17 00:00:00 2001
+From: William Cohen <wcohen@redhat.com>
+Date: Mon, 15 Apr 2013 17:22:16 -0400
+Subject: [PATCH] Use rmb() for the missing mb() definition
+
+Commit 59d3d7584b2925bd05b4b5d0f4fe89666eb8494a removed the definition of
+mb().  mb() was defined as rmb().  This just corrects it back.
+
+Signed-off-by: William Cohen <wcohen@redhat.com>
+---
+ src/linux-lock.h | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/linux-lock.h b/src/linux-lock.h
+index 741e352..6fe1da5 100644
+--- a/src/linux-lock.h
++++ b/src/linux-lock.h
+@@ -186,8 +186,8 @@ static inline int __arm_papi_spin_lock (volatile unsigned int *lock)
+ 
+   return 0;
+ }
+-#define _papi_hwd_lock(lck)   { mb(); __arm_papi_spin_lock(&_papi_hwd_lock_data[lck]); mb(); }
+-#define _papi_hwd_unlock(lck) { mb(); _papi_hwd_lock_data[lck] = 0; mb(); }
++#define _papi_hwd_lock(lck)   { rmb(); __arm_papi_spin_lock(&_papi_hwd_lock_data[lck]); rmb(); }
++#define _papi_hwd_unlock(lck) { rmb(); _papi_hwd_lock_data[lck] = 0; rmb(); }
+ 
+ #elif defined(__mips__)
+ static inline void __raw_spin_lock(volatile unsigned int *lock)
+-- 
+1.8.1.4
+
diff --git a/papi.spec b/papi.spec
index 261802a..2f6f5fb 100644
--- a/papi.spec
+++ b/papi.spec
@@ -2,11 +2,12 @@
 Summary: Performance Application Programming Interface
 Name: papi
 Version: 5.1.0.2
-Release: 1%{?dist}
+Release: 2%{?dist}
 License: BSD
 Group: Development/System
 URL: http://icl.cs.utk.edu/papi/
 Source0: http://icl.cs.utk.edu/projects/papi/downloads/%{name}-%{version}.tar.gz
+Patch10: papi-rmb.patch
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root
 BuildRequires: ncurses-devel
 BuildRequires: gcc-gfortran
@@ -47,6 +48,7 @@ the PAPI user-space libraries and interfaces.
 
 %prep
 %setup -q -n papi-5.1.0
+%patch10 -p1 -b .rmb
 
 %build
 %if %{without bundled_libpfm}
@@ -109,6 +111,9 @@ rm -rf $RPM_BUILD_ROOT
 %{_libdir}/*.a
 
 %changelog
+* Mon Apr 15 2013 William Cohen <wcohen@redhat.com> - 5.1.0.2-2
+- Fix arm FTBS rhbz 951806.
+
 * Tue Apr 9 2013 William Cohen <wcohen@redhat.com> - 5.1.0.2-1
 - Rebase to 5.1.0.2