1 files changed, 1 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 7cb7e7f..850a450 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,7 @@ TEST_SRC=bls_test.cpp bls_if_test.cpp
 SAMPLE_SRC=bls_smpl.cpp bls_tool.cpp
 
 CFLAGS+=-I../mcl/include
+UNIT?=4
 ifeq ($(UNIT),4)
   CFLAGS+=-DBLS_MAX_OP_UNIT_SIZE=4
   GO_TAG=bn256