diff --git a/Makefile b/Makefile
index b72d3c0d..cd39151d 100644
--- a/Makefile
+++ b/Makefile
@@ -5,8 +5,7 @@ DEBUG=0
 OPENMP=0
 LIBSO=0
 
-ARCH= -gencode arch=compute_20,code=[sm_20,sm_21] \
-      -gencode arch=compute_30,code=sm_30 \
+ARCH= -gencode arch=compute_30,code=sm_30 \
       -gencode arch=compute_35,code=sm_35 \
       -gencode arch=compute_50,code=[sm_50,compute_50] \
       -gencode arch=compute_52,code=[sm_52,compute_52] \