diff --git a/ChangeLog b/ChangeLog
index dd5a2b5b18..2d53b2b4ae 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-17  Siddhesh Poyarekar  <siddhesh.poyarekar@linaro.org>
+
+	* benchtests/scripts/bench.py (_print_arg_data): Mark output variables
+	as used.
+
 2015-11-16  Florian Weimer  <fweimer@redhat.com>
 
 	* math/test-signgam-finite-c99.c (_Mlong_double_): Undefine.
diff --git a/benchtests/scripts/bench.py b/benchtests/scripts/bench.py
index ee856db821..7752c8a7fb 100755
--- a/benchtests/scripts/bench.py
+++ b/benchtests/scripts/bench.py
@@ -164,7 +164,7 @@ def _print_arg_data(func, directives, all_vals):
             if pos == -1:
                 die('Output argument must be a pointer type')
 
-            outargs.append('static %s out%d;' % (arg[1:pos], i))
+            outargs.append('static %s out%d __attribute__((used));' % (arg[1:pos], i))
             func_args.append(' &out%d' % i)
         else:
             arg_struct.append('  %s volatile arg%d;' % (arg, i))