1 files changed, 8 insertions, 1 deletions
diff --git a/bat_tray.c b/bat_tray.c
index f9bb1bf..c6e9f45 100644
--- a/bat_tray.c
+++ b/bat_tray.c
@@ -138,11 +138,18 @@ static void update_tooltip_cache()
 static gboolean update()
 {
 	char icon_file[1024];
-	unsigned int rounded = 0;
+	int rounded = 0;
 
 	/* Round percentage to 0, 20, 40, 60, 80 or 100 */
 	rounded = 20 * (int)((get_bat_percent() + 10) / 20);
 
+	/* cap rounded value to safe bounds */
+	if (rounded < 0)
+		rounded = 0;
+
+	if (rounded > 100)
+		rounded = 100;
+
 	switch (get_battery_state())
 	{
 		case STATE_DISCHARGING: