diff --git a/libs/librange.lua b/libs/librange.lua
index 10ba9042..c6e9c1a2 100644
--- a/libs/librange.lua
+++ b/libs/librange.lua
@@ -163,11 +163,11 @@ librange:SetScript("OnUpdate", function()
     if not UnitIsUnit("target", unit) then
       -- try to read distance via superwow first
       if superwow_active then
-        local x1, y1 = UnitPosition("player")
-        local x2, y2 = UnitPosition(unit)
+        local x1, y1, z1 = UnitPosition("player")
+        local x2, y2, z2 = UnitPosition(unit)
         -- only continue if we got position values
-        if (x1 and x1 > 0) and (x2 and x2 > 0) then
-          local distance = ((x2 - x1)^2 + (y2 - y1)^2)^.5
+        if x1 and y1 and z1 and x2 and y2 and z2 then
+          local distance = ((x2 - x1)^2 + (y2 - y1)^2 + (z2 - z1)^2)^.5
           unitdata[unit] = distance < 45 and 1 or 0
           this.id = this.id + 1
           return