diff --git a/CMakeLists.txt b/CMakeLists.txt
index ffe79cc4a..247ae22bc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -690,7 +690,7 @@ IF(QMC_CUDA)
       # SET(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS};-O3;-use_fast_math")
       SET(CUDA_NVCC_FLAGS "${CUDA_NVCC_FLAGS};-O3")
     ENDIF()
-    SET( CUDA_ARCH sm_35 CACHE STRING "Maximum time for one test")
+    SET( CUDA_ARCH sm_35 CACHE STRING "CUDA architecture sm_XX")
     SET(CUDA_NVCC_FLAGS "-arch=${CUDA_ARCH};${CUDA_NVCC_FLAGS}")
   endif(CUDA_NVCC_FLAGS MATCHES "arch")
   set(HAVE_CUDA 1)