diff --git a/Makefile b/Makefile
index 33925d025..9e827f43f 100644
--- a/Makefile
+++ b/Makefile
@@ -10,13 +10,13 @@ BPATH=.
 # objectives that makes up rabit library
 MPIOBJ= $(BPATH)/engine_mpi.o
 OBJ= $(BPATH)/allreduce_base.o $(BPATH)/allreduce_robust.o $(BPATH)/engine.o $(BPATH)/engine_empty.o $(BPATH)/engine_mock.o\
-	$(BPATH)/rabit_wrapper.o
+	$(BPATH)/rabit_wrapper.o $(BPATH)/engine_base.o
 SLIB= wrapper/librabit_wrapper.so wrapper/librabit_wrapper_mock.so wrapper/librabit_wrapper_mpi.so
-ALIB= lib/librabit.a lib/librabit_mpi.a lib/librabit_empty.a lib/librabit_mock.a
+ALIB= lib/librabit.a lib/librabit_mpi.a lib/librabit_empty.a lib/librabit_mock.a lib/librabit_base.a
 HEADERS=src/*.h include/*.h include/rabit/*.h
 .PHONY: clean all install mpi python
 
-all: lib/librabit.a lib/librabit_mock.a wrapper/librabit_wrapper.so wrapper/librabit_wrapper_mock.so
+all: lib/librabit.a lib/librabit_mock.a  wrapper/librabit_wrapper.so wrapper/librabit_wrapper_mock.so
 mpi: lib/librabit_mpi.a wrapper/librabit_wrapper_mpi.so
 python: wrapper/librabit_wrapper.so wrapper/librabit_wrapper_mock.so
 
@@ -26,8 +26,10 @@ $(BPATH)/allreduce_robust.o: src/allreduce_robust.cc $(HEADERS)
 $(BPATH)/engine_mpi.o: src/engine_mpi.cc $(HEADERS)
 $(BPATH)/engine_empty.o: src/engine_empty.cc $(HEADERS)
 $(BPATH)/engine_mock.o: src/engine_mock.cc $(HEADERS)
+$(BPATH)/engine_base.o: src/engine_base.cc $(HEADERS)
 
 lib/librabit.a: $(BPATH)/allreduce_base.o $(BPATH)/allreduce_robust.o $(BPATH)/engine.o
+lib/librabit_base.a: $(BPATH)/allreduce_base.o $(BPATH)/engine_base.o
 lib/librabit_mock.a: $(BPATH)/allreduce_base.o $(BPATH)/allreduce_robust.o $(BPATH)/engine_mock.o
 lib/librabit_empty.a: $(BPATH)/engine_empty.o
 lib/librabit_mpi.a: $(MPIOBJ)
diff --git a/src/engine.cc b/src/engine.cc
index b58f738d3..c5041642e 100644
--- a/src/engine.cc
+++ b/src/engine.cc
@@ -17,11 +17,15 @@
 namespace rabit {
 namespace engine {
 // singleton sync manager
+#ifndef RABIT_USE_BASE
 #ifndef RABIT_USE_MOCK
 AllreduceRobust manager;
 #else
 AllreduceMock manager;
 #endif
+#else
+AllreduceBase manager;
+#endif
 
 /*! \brief intiialize the synchronization module */
 void Init(int argc, char *argv[]) {
diff --git a/src/engine_base.cc b/src/engine_base.cc
new file mode 100644
index 000000000..62739536f
--- /dev/null
+++ b/src/engine_base.cc
@@ -0,0 +1,15 @@
+/*!
+ *  Copyright (c) 2014 by Contributors
+ * \file engine_mock.cc
+ * \brief this is an engine implementation that will 
+ * insert failures in certain call point, to test if the engine is robust to failure
+ * \author Tianqi Chen
+ */
+// define use MOCK, os we will use mock Manager
+#define _CRT_SECURE_NO_WARNINGS
+#define _CRT_SECURE_NO_DEPRECATE
+#define NOMINMAX
+// switch engine to AllreduceMock
+#define RABIT_USE_BASE
+#include "./engine.cc"
+