diff --git a/README.md b/README.md
index 37b23aa..bf819ed 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ optional: intllib
 
 
 # License
-Copyright (C) 2017-2019 Joachim Stolberg  
+Copyright (C) 2017-2020 Joachim Stolberg  
 Code: Licensed under the GNU LGPL version 2.1 or later.
       See LICENSE.txt and http://www.gnu.org/licenses/lgpl-2.1.txt  
 Textures: CC0
@@ -78,5 +78,6 @@ Textures: CC0
 - 2019-05-09  v1.4  * Attribute 'tube_type' added
 - 2019-07-12  v1.5  * internal handling of secondary nodes changed
 - 2019-10-25  v1.6  * callback 'tubelib2_on_update2' added
+- 2020-01-03  v1.7  * max_tube_length bugfix
 
 
diff --git a/internal1.lua b/internal1.lua
index 7af35e8..4abc557 100644
--- a/internal1.lua
+++ b/internal1.lua
@@ -3,7 +3,7 @@
 	Tube Library 2
 	==============
 
-	Copyright (C) 2018 Joachim Stolberg
+	Copyright (C) 2018-2020 Joachim Stolberg
 
 	LGPLv2.1+
 	See LICENSE.txt for more information
@@ -101,7 +101,8 @@ function Tube:update_secondary_node(pos1, dir1, pos2, dir2)
 			ndef.tubelib2_on_update2(pos1, dir1, self, node)
 		elseif ndef.tubelib2_on_update then
 			ndef.tubelib2_on_update(node, pos1, dir1, pos2, Turn180Deg[dir2])
-		elseif self.clbk_update_secondary_node then
+		end
+		if self.clbk_update_secondary_node then
 			self.clbk_update_secondary_node(node, pos1, dir1, pos2, Turn180Deg[dir2])
 		end
 	end
diff --git a/internal2.lua b/internal2.lua
index d4d69bc..ebb735d 100644
--- a/internal2.lua
+++ b/internal2.lua
@@ -3,7 +3,7 @@
 	Tube Library 2
 	==============
 
-	Copyright (C) 2018 Joachim Stolberg
+	Copyright (C) 2018-2020 Joachim Stolberg
 
 	LGPLv2.1+
 	See LICENSE.txt for more information
@@ -390,9 +390,6 @@ function Tube:walk_tube_line(pos, dir)
 			pos, dir = new_pos, new_dir
 			cnt = cnt + 1
 		end
-		if cnt > self.max_tube_length then
-			return
-		end
 		if cnt > 0 then
 			return pos, dir, cnt
 		end
diff --git a/storage.lua b/storage.lua
index bde34a2..1a2dd80 100644
--- a/storage.lua
+++ b/storage.lua
@@ -3,7 +3,7 @@
 	Tube Library 2
 	==============
 
-	Copyright (C) 2017-2018 Joachim Stolberg
+	Copyright (C) 2017-2020 Joachim Stolberg
 
 	LGPLv2.1+
 	See LICENSE.txt for more information
diff --git a/tube_api.lua b/tube_api.lua
index 18d9cd7..7e4483c 100644
--- a/tube_api.lua
+++ b/tube_api.lua
@@ -3,7 +3,7 @@
 	Tube Library 2
 	==============
 
-	Copyright (C) 2017-2018 Joachim Stolberg
+	Copyright (C) 2017-2020 Joachim Stolberg
 
 	LGPLv2.1+
 	See LICENSE.txt for more information
@@ -13,7 +13,7 @@
 ]]--
 
 -- Version for compatibility checks, see readme.md/history
-tubelib2.version = 1.6
+tubelib2.version = 1.7
 
 -- for lazy programmers
 local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
diff --git a/tube_test.lua b/tube_test.lua
index dba6255..73a62b9 100644
--- a/tube_test.lua
+++ b/tube_test.lua
@@ -3,7 +3,7 @@
 	Tube Library 2
 	==============
 
-	Copyright (C) 2017-2018 Joachim Stolberg
+	Copyright (C) 2017-2020 Joachim Stolberg
 
 	LGPLv2.1+
 	See LICENSE.txt for more information