// Fix PHP notice

classes/Currency.php

@@ -364,10 +364,8 @@ class CurrencyCore extends ObjectModel
 					}
 			}
 
-			if (!isset($rate))
+			if (isset($rate))
-				$rate = 1;
+				$this->conversion_rate = round($rate / $conversion_rate, 6);
-
-			$this->conversion_rate = round($rate / $conversion_rate, 6);
 		}
 		$this->update();
 	}