diff --git a/test/test-advice-of-charge b/test/test-advice-of-charge
index d71b7c65..9f3f6556 100755
--- a/test/test-advice-of-charge
+++ b/test/test-advice-of-charge
@@ -73,7 +73,7 @@ if __name__ == "__main__":
 	else:
 		try:
 			if property == 'AccumulatedCallMeterMaximum':
-				newvalue = int(newvalue)
+				newvalue = dbus.UInt32(newvalue)
 			elif property == 'PricePerUnit':
 				newvalue = float(newvalue)
 			cm.SetProperty(property, newvalue, pin)