diff --git a/csrc/pythonInterface.c b/csrc/pythonInterface.c
index 0aa82fe..865e4b6 100644
--- a/csrc/pythonInterface.c
+++ b/csrc/pythonInterface.c
@@ -385,6 +385,11 @@ extern "C"
 
 	void cprefetch(void *ptr, size_t bytes, int device)
 	{
+
+		int hasPrefetch = 0;
+		CUDA_CHECK_RETURN(cudaDeviceGetAttribute(&hasPrefetch, cudaDevAttrConcurrentManagedAccess, device)); // 40ns overhead
+		if (hasPrefetch == 0) return;
+ 
 		CUDA_CHECK_RETURN(cudaMemPrefetchAsync(ptr, bytes, device, 0));
 		CUDA_CHECK_RETURN(cudaPeekAtLastError());
 	}