diff --git a/include/linux/unistd.h b/include/linux/unistd.h
index 10ed9834b82241c5c102504217fc288ff528f4c8..c18c60f3254ec998d33222aa1bd226c1f6314441 100644
--- a/include/linux/unistd.h
+++ b/include/linux/unistd.h
@@ -1,7 +1,9 @@
 #ifndef _LINUX_UNISTD_H_
 #define _LINUX_UNISTD_H_
 
+#ifdef __KERNEL__
 extern int errno;
+#endif
 
 /*
  * Include machine specific syscallX macros