Guard headers tool.
diff --git a/include/grpc/status.h b/include/grpc/status.h
index 76a71ed..a1a4d2f 100644
--- a/include/grpc/status.h
+++ b/include/grpc/status.h
@@ -31,8 +31,8 @@
  *
  */
 
-#ifndef __GRPC_STATUS_H__
-#define __GRPC_STATUS_H__
+#ifndef GRPC_STATUS_H
+#define GRPC_STATUS_H
 
 #ifdef __cplusplus
 extern "C" {
@@ -199,4 +199,4 @@
 }
 #endif
 
-#endif /* __GRPC_STATUS_H__ */
+#endif  /* GRPC_STATUS_H */