diff --git a/libvips/iofuncs/buffer.c b/libvips/iofuncs/buffer.c
index 5f0dc69b..c875e6e1 100644
--- a/libvips/iofuncs/buffer.c
+++ b/libvips/iofuncs/buffer.c
@@ -197,7 +197,7 @@ vips_buffer_done( VipsBuffer *buffer )
 	}
 }
 
-/* Take off the public 'done' list. 
+/* Take off the public 'done' list. Make sure it has no calculated pixels in. 
  */
 void
 vips_buffer_undone( VipsBuffer *buffer )
@@ -226,14 +226,15 @@ vips_buffer_undone( VipsBuffer *buffer )
 		buffer->done = FALSE;
 		buffer->cache = NULL;
 
-		buffer->area.width = 0;
-		buffer->area.height = 0;
 
 #ifdef DEBUG
 		printf( "vips_buffer_undone: %d buffers left\n",
 			g_slist_length( cache_list->buffers ) );
 #endif /*DEBUG*/
 	}
+
+	buffer->area.width = 0;
+	buffer->area.height = 0;
 }
 
 void
diff --git a/libvips/iofuncs/region.c b/libvips/iofuncs/region.c
index f590a6cb..77598091 100644
--- a/libvips/iofuncs/region.c
+++ b/libvips/iofuncs/region.c
@@ -782,11 +782,8 @@ vips_region_region( VipsRegion *reg,
 
 	/* Init new stuff.
 	 */
-	if( reg->buffer ) {
+	if( reg->buffer ) 
 		vips_buffer_undone( reg->buffer );
-		reg->buffer->area.width = 0;
-		reg->buffer->area.height = 0;
-	}
 	reg->invalid = FALSE;
 	reg->valid = final;
 	reg->bpl = dest->bpl;
diff --git a/libvipsCC/VImage.cc b/libvipsCC/VImage.cc
index 845e61f3..41cabd9c 100644
--- a/libvipsCC/VImage.cc
+++ b/libvipsCC/VImage.cc
@@ -59,7 +59,7 @@ bool init( const char *argv0 )
 	return( vips_init( argv0 ) == 0 ); 
 }
 
-void shutdown( void )
+void shutdown()
 {
 	vips_shutdown(); 
 }