diff --git a/stairsplus/registrations.lua b/stairsplus/registrations.lua
index 799f849..cabe4b0 100644
--- a/stairsplus/registrations.lua
+++ b/stairsplus/registrations.lua
@@ -77,33 +77,37 @@ end
 
 -- wool registrations
 
-local colorlist = {
-	{"white",      "White"},
-	{"grey",       "Grey"},
-	{"black",      "Black"},
-	{"red",        "Red"},
-	{"yellow",     "Yellow"},
-	{"green",      "Green"},
-	{"cyan",       "Cyan"},
-	{"blue",       "Blue"},
-	{"magenta",    "Magenta"},
-	{"orange",     "Orange"},
-	{"violet",     "Violet"},
-	{"brown",      "Brown"},
-	{"pink",       "Pink"},
-	{"dark_grey",  "Dark Grey"},
-	{"dark_green", "Dark Green"},
-}
+if minetest.get_modpath("wool") then
 
-for i in ipairs(colorlist) do
-	local color = colorlist[i][1]
-	local colordesc = colorlist[i][2]
+	local colorlist = {
+		{"white",      "White"},
+		{"grey",       "Grey"},
+		{"black",      "Black"},
+		{"red",        "Red"},
+		{"yellow",     "Yellow"},
+		{"green",      "Green"},
+		{"cyan",       "Cyan"},
+		{"blue",       "Blue"},
+		{"magenta",    "Magenta"},
+		{"orange",     "Orange"},
+		{"violet",     "Violet"},
+		{"brown",      "Brown"},
+		{"pink",       "Pink"},
+		{"dark_grey",  "Dark Grey"},
+		{"dark_green", "Dark Green"},
+	}
+
+	for i in ipairs(colorlist) do
+		local color = colorlist[i][1]
+		local colordesc = colorlist[i][2]
 		
-	stairsplus:register_all("wool", color, "wool:"..color, {
-		description = colordesc.." Wool",
-		tiles = {"wool_"..color..".png"},
-		groups = {snappy=2,choppy=2,oddly_breakable_by_hand=3,flammable=3,wool=1,not_in_creative_inventory=1},
-		sounds = default.node_sound_defaults(),
-		sunlight_propagates = true,
-	})
+		stairsplus:register_all("wool", color, "wool:"..color, {
+			description = colordesc.." Wool",
+			tiles = {"wool_"..color..".png"},
+			groups = {snappy=2,choppy=2,oddly_breakable_by_hand=3,
+					flammable=3,wool=1,not_in_creative_inventory=1},
+			sounds = default.node_sound_defaults(),
+			sunlight_propagates = true,
+		})
+	end
 end