diff --git a/libethash-cuda/CMakeLists.txt b/libethash-cuda/CMakeLists.txt
index e1be8c9d0..fac71a6b2 100644
--- a/libethash-cuda/CMakeLists.txt
+++ b/libethash-cuda/CMakeLists.txt
@@ -11,7 +11,6 @@ else()
 	set(
 		CUDA_NVCC_FLAGS
 		${CUDA_NVCC_FLAGS}
-		"-gencode arch=compute_20,code=sm_20"
 		"-gencode arch=compute_30,code=sm_30"
 		"-gencode arch=compute_35,code=sm_35"
 		"-gencode arch=compute_50,code=sm_50"