diff --git a/Makefile b/Makefile
index e85b33ce..fa5a62bd 100644
--- a/Makefile
+++ b/Makefile
@@ -12,10 +12,15 @@ ifndef DMLC_CORE
 	DMLC_CORE = dmlc-core
 endif
 
+ifneq ($(USE_OPENMP_ITER),1)
+	export NO_OPENMP = 1
+endif
+
 # use customized config file
 include $(config)
 include mshadow/make/mshadow.mk
 include $(DMLC_CORE)/make/dmlc.mk
+unexport NO_OPENMP
 
 # all tge possible warning tread
 WARNFLAGS= -Wall
@@ -63,7 +68,10 @@ ifneq ($(ADD_LDFLAGS), NONE)
 endif
 
 # specify tensor path
-BIN = bin/cxxnet bin/im2rec bin/bin2rec
+BIN = bin/cxxnet 
+ifeq ($(USE_OPENCV),1)
+	BIN += bin/im2rec bin/bin2rec
+endif
 SLIB = wrapper/libcxxnetwrapper.so
 OBJ = layer_cpu.o updater_cpu.o nnet_cpu.o main.o nnet_ps_server.o
 OBJCXX11 = data.o
diff --git a/src/utils/thread.h b/src/utils/thread.h
index ef70be86..f2eee178 100644
--- a/src/utils/thread.h
+++ b/src/utils/thread.h
@@ -84,7 +84,7 @@ class Semaphore {
       perror("sem_open");
       exit(1);
     }
-    utils::Assert(semPtr != NULL, "create Semaphore error");
+    mshadow::utils::Assert(semPtr != NULL, "create Semaphore error");
   }
   inline void Destroy(void) {
     if (sem_close(semPtr) == -1) {