diff --git a/src/cpu/o3/iew.hh b/src/cpu/o3/iew.hh
index 25114c20e6..957a085aef 100644
--- a/src/cpu/o3/iew.hh
+++ b/src/cpu/o3/iew.hh
@@ -471,16 +471,10 @@ class DefaultIEW
     Stats::Vector producerInst;
     /** Number of instructions that wake up from producers. */
     Stats::Vector consumerInst;
-    /** Number of instructions that were delayed in writing back due
-     * to resource contention.
-     */
-    Stats::Vector wbPenalized;
     /** Number of instructions per cycle written back. */
     Stats::Formula wbRate;
     /** Average number of woken instructions per writeback. */
     Stats::Formula wbFanout;
-    /** Number of instructions per cycle delayed in writing back . */
-    Stats::Formula wbPenalizedRate;
 };
 
 #endif // __CPU_O3_IEW_HH__
diff --git a/src/cpu/o3/iew_impl.hh b/src/cpu/o3/iew_impl.hh
index 29596db092..ae76aa9e14 100644
--- a/src/cpu/o3/iew_impl.hh
+++ b/src/cpu/o3/iew_impl.hh
@@ -273,19 +273,6 @@ DefaultIEW<Impl>::regStats()
         .desc("num instructions consuming a value")
         .flags(total);
 
-    wbPenalized
-        .init(cpu->numThreads)
-        .name(name() + ".wb_penalized")
-        .desc("number of instrctions required to write to 'other' IQ")
-        .flags(total);
-
-    wbPenalizedRate
-        .name(name() + ".wb_penalized_rate")
-        .desc ("fraction of instructions written-back that wrote to 'other' IQ")
-        .flags(total);
-
-    wbPenalizedRate = wbPenalized / writebackCount;
-
     wbFanout
         .name(name() + ".wb_fanout")
         .desc("average fanout of values written-back")