diff --git a/src/cpu/o3/cpu.cc b/src/cpu/o3/cpu.cc
index e13d7a9595..515d87f1b7 100644
--- a/src/cpu/o3/cpu.cc
+++ b/src/cpu/o3/cpu.cc
@@ -674,6 +674,7 @@ template <class Impl>
 void
 FullO3CPU<Impl>::startup()
 {
+    BaseCPU::startup();
     for (int tid = 0; tid < numThreads; ++tid)
         isa[tid]->startup(threadContexts[tid]);