diff --git a/modules/resourceusage/widget.go b/modules/resourceusage/widget.go
index 02fc3bd9..29b203d3 100644
--- a/modules/resourceusage/widget.go
+++ b/modules/resourceusage/widget.go
@@ -105,7 +105,7 @@ func MakeGraph(widget *Widget) {
 	usedSwapLabel := bytefmt.ByteSize(swapUsed)
 	totalSwapLabel := bytefmt.ByteSize(memInfo.SwapTotal)
 
-	if usedSwapLabel[len(usedSwapLabel)-1] == totalMemLabel[len(totalSwapLabel)-1] {
+	if usedSwapLabel[len(usedSwapLabel)-1] == totalSwapLabel[len(totalSwapLabel)-1] {
 		usedSwapLabel = usedSwapLabel[:len(usedSwapLabel)-1]
 	}