diff --git a/src/nano.h b/src/nano.h
index 373ce5c2..23962edf 100644
--- a/src/nano.h
+++ b/src/nano.h
@@ -19,9 +19,6 @@
  *                                                                        *
  **************************************************************************/
 
-#ifndef NANO_H
-#define NANO_H 1
-
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
@@ -650,5 +647,3 @@ enum
 
 /* The largest size_t number that doesn't have the high bit set. */
 #define HIGHEST_POSITIVE ((~(size_t)0) >> 1)
-
-#endif /* !NANO_H */
diff --git a/src/proto.h b/src/proto.h
index 920e6da2..e8adf250 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -18,9 +18,6 @@
  *                                                                        *
  **************************************************************************/
 
-#ifndef PROTO_H
-#define PROTO_H 1
-
 #include "nano.h"
 
 /* All external variables.  See global.c for their descriptions. */
@@ -699,5 +696,3 @@ void flip_newbuffer(void);
 #endif
 void discard_buffer(void);
 void do_cancel(void);
-
-#endif /* !PROTO_H */