diff --git a/src/cpu/inst_pb_trace.hh b/src/cpu/inst_pb_trace.hh
index 326f8b93a7..bdafb6245d 100644
--- a/src/cpu/inst_pb_trace.hh
+++ b/src/cpu/inst_pb_trace.hh
@@ -82,7 +82,7 @@ class InstPBTraceRecord : public InstRecord
 
 };
 
-class InstPBTrace : InstTracer
+class InstPBTrace : public InstTracer
 {
  public:
     InstPBTrace(const InstPBTraceParams *p);