Script not changing text properly?

I'm creating a stopwatch, it's working, but it's supposed to change the text of the label to stopWatchSeconds.."seconds" but it only changes it to stopWatchSeconds instead of stopWatchSeconds.."seconds"

Here's my script:

local sGui = script.Parent
local holderGui = sGui.Holder
local labelGui = holderGui.Stopwatch

local stopWatchSeconds = 0

while true do
    stopWatchSeconds = stopWatchSeconds + 0.1
    labelGui.Text = tostring(stopWatchSeconds).." seconds"
    wait(0.1)
end