diff --git a/beanpole.lua b/beanpole.lua
index e8b7455..5bd0448 100644
--- a/beanpole.lua
+++ b/beanpole.lua
@@ -7,7 +7,7 @@
 local S = farming.intllib
 
 -- place beans
-function place_beans(itemstack, placer, pointed_thing, plantname)
+local function place_beans(itemstack, placer, pointed_thing, plantname)
 
 	local pt = pointed_thing
 
diff --git a/cocoa.lua b/cocoa.lua
index 3ee3532..b394ab2 100644
--- a/cocoa.lua
+++ b/cocoa.lua
@@ -2,7 +2,7 @@
 local S = farming.intllib
 
 -- place cocoa
-function place_cocoa(itemstack, placer, pointed_thing, plantname)
+local function place_cocoa(itemstack, placer, pointed_thing, plantname)
 
 	local pt = pointed_thing
 
diff --git a/grapes.lua b/grapes.lua
index d8d6409..baedb4e 100644
--- a/grapes.lua
+++ b/grapes.lua
@@ -2,7 +2,7 @@
 local S = farming.intllib
 
 -- place trellis
-function place_grapes(itemstack, placer, pointed_thing, plantname)
+local function place_grapes(itemstack, placer, pointed_thing, plantname)
 
 	local pt = pointed_thing