diff --git a/cuda.h b/cuda.h
new file mode 100644
index 0000000..0162a18
--- /dev/null
+++ b/cuda.h
@@ -0,0 +1,10 @@
+#ifndef _CUDA_LA_H
+#define _CUDA_LA_H
+
+#ifdef CUDA
+#define GPU_NOT_IMPLEMENTED {laerror("Operation not implemented on GPU. Use .moveto(0) first.");}
+#else
+#define GPU_NOT_IMPLEMENTED {}
+#endif
+
+#endif