diff --git a/include/linux/cuda.h b/include/linux/cuda.h
index 6a3e638..9f9865f 100644
--- a/include/linux/cuda.h
+++ b/include/linux/cuda.h
@@ -5,6 +5,9 @@
  * Copyright (C) 1996 Paul Mackerras.
  */
 
+#ifndef _LINUX_CUDA_H
+#define _LINUX_CUDA_H
+
 /* CUDA commands (2nd byte) */
 #define CUDA_WARM_START		0
 #define CUDA_AUTOPOLL		1
@@ -34,3 +37,5 @@
 extern void cuda_poll(void);
 
 #endif	/* __KERNEL */
+
+#endif /* _LINUX_CUDA_H */