diff --git a/releasenotes.md b/releasenotes.md
index b9e851a..23b3beb 100644
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -1,6 +1,13 @@
 # Release Notes of the ModPack TechPack [techpack]
 
 
+## V1.15.1 (2018-09-17)
+
+### Fixes
+- Button bug (detected in the video of Nathan) fixed
+
+
+
 ## V1.15 (2018-09-15)
 
 ### Additions
diff --git a/smartline/button.lua b/smartline/button.lua
index c1f434f..97739e4 100644
--- a/smartline/button.lua
+++ b/smartline/button.lua
@@ -129,7 +129,7 @@ minetest.register_node("smartline:button", {
 	
 	on_rightclick = function(pos, node, clicker)
 		local meta = minetest.get_meta(pos)
-		if meta:get_string("numbers") then
+		if meta:get_string("numbers") ~= "" then
 			meta:set_string("clicker_name", clicker:get_player_name())
 			switch_on(pos, node)
 		end
diff --git a/tubelib/button.lua b/tubelib/button.lua
index 548142c..78d8a59 100644
--- a/tubelib/button.lua
+++ b/tubelib/button.lua
@@ -121,7 +121,7 @@ minetest.register_node("tubelib:button", {
 	
 	on_rightclick = function(pos, node, clicker)
 		local meta = minetest.get_meta(pos)
-		if meta:get_string("numbers") then
+		if meta:get_string("numbers") ~= "" then
 			meta:set_string("clicker_name", clicker:get_player_name())
 			switch_on(pos, node)
 		end