diff --git a/src/include/gpxe/linebuf.h b/src/include/gpxe/linebuf.h
index f4481ddf..5d815394 100644
--- a/src/include/gpxe/linebuf.h
+++ b/src/include/gpxe/linebuf.h
@@ -22,7 +22,7 @@ struct line_buffer {
 
 extern char * buffered_line ( struct line_buffer *linebuf );
 extern int line_buffer ( struct line_buffer *linebuf,
-		  const char **data, size_t *len );
+			 const char **data, size_t *len );
 extern void empty_line_buffer ( struct line_buffer *linebuf );
 
 #endif /* _GPXE_LINEBUF_H */