diff --git a/init.lua b/init.lua
index b89cff7..536066f 100644
--- a/init.lua
+++ b/init.lua
@@ -571,7 +571,9 @@ function signs_lib.determine_sign_type(itemstack, placer, pointed_thing, locked)
 
 	local node=minetest.get_node(pointed_thing.under)
 
-	if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
+	if minetest.registered_nodes[node.name] and
+	   minetest.registered_nodes[node.name].on_rightclick and
+	   not placer:get_player_control().sneak then
 		return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack, pointed_thing)
 	else
 		local above = pointed_thing.above