diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/pocket/equip.lua b/src/main/resources/assets/computercraft/lua/rom/programs/pocket/equip.lua
index 44599a1c8..62aa7c98d 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/pocket/equip.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/pocket/equip.lua
@@ -1,3 +1,8 @@
+if not pocket then
+    printError( "Requires a Pocket Computer" )
+    return
+end
+
 local ok, err = pocket.equipBack()
 if not ok then
     printError( err )
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/pocket/unequip.lua b/src/main/resources/assets/computercraft/lua/rom/programs/pocket/unequip.lua
index 99189aa59..28308d407 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/pocket/unequip.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/pocket/unequip.lua
@@ -1,3 +1,8 @@
+if not pocket then
+    printError( "Requires a Pocket Computer" )
+    return
+end
+
 local ok, err = pocket.unequipBack()
 if not ok then
     printError( err )
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/craft.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/craft.lua
index 581229039..8b273c2d6 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/craft.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/craft.lua
@@ -1,3 +1,7 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
 
 if not turtle.craft then
     print( "Requires a Crafty Turtle" )
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/dance.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/dance.lua
index dc3c7d083..6f32a1df0 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/dance.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/dance.lua
@@ -1,3 +1,6 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+end
 
 local tMoves = {
     function()
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/equip.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/equip.lua
index e10cf2dfb..0a8f2a480 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/equip.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/equip.lua
@@ -1,3 +1,7 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
 
 local tArgs = { ... }
 local function printUsage()
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/excavate.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/excavate.lua
index 2c47f2986..677e43678 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/excavate.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/excavate.lua
@@ -1,3 +1,7 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
 
 local tArgs = { ... }
 if #tArgs ~= 1 then
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/go.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/go.lua
index 19a1ee6ea..c84120ce0 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/go.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/go.lua
@@ -1,3 +1,8 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
+
 local tArgs = { ... }
 if #tArgs < 1 then
     print( "Usage: go <direction> <distance>" )
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/refuel.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/refuel.lua
index 618b199cb..d9f606f8c 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/refuel.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/refuel.lua
@@ -1,3 +1,7 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
 
 local tArgs = { ... }
 local nLimit = 1
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/tunnel.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/tunnel.lua
index 4ee78ecde..9345a6225 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/tunnel.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/tunnel.lua
@@ -1,3 +1,7 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
 
 local tArgs = { ... }
 if #tArgs ~= 1 then
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/turn.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/turn.lua
index deb6c5aa0..4ab6151ec 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/turn.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/turn.lua
@@ -1,3 +1,8 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
+
 local tArgs = { ... }
 if #tArgs < 1 then
     print( "Usage: turn <direction> <turns>" )
diff --git a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/unequip.lua b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/unequip.lua
index ababde40f..38e864f4b 100644
--- a/src/main/resources/assets/computercraft/lua/rom/programs/turtle/unequip.lua
+++ b/src/main/resources/assets/computercraft/lua/rom/programs/turtle/unequip.lua
@@ -1,3 +1,7 @@
+if not turtle then
+    printError( "Requires a Turtle" )
+    return
+end
 
 local tArgs = { ... }
 local function printUsage()