diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 2db4937be7..dcadcd6fbf 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,3 +1,8 @@
+2006-03-29  Hans-Peter Nilsson  <hp@axis.com>
+
+	* aclocal.m4 (SIM_AC_OPTION_HARDWARE): Correct duplicate-
+	option-contents test.
+
 2005-11-28  Mark Mitchell  <mark@codesourcery.com>
 
 	* sim-signal.c (sim_signal_to_target): Fix typos.
diff --git a/sim/common/aclocal.m4 b/sim/common/aclocal.m4
index 056bebacb9..d94b1e6ade 100644
--- a/sim/common/aclocal.m4
+++ b/sim/common/aclocal.m4
@@ -593,9 +593,8 @@ else
   # remove duplicates
   sim_hw=""
   sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
-  for i in x $hardware ; do
-    case " $f " in
-      x) ;;
+  for i in $hardware ; do
+    case " $sim_hw " in
       *" $i "*) ;;
       *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
     esac