diff --git a/Utils/gen-card.pl b/Utils/gen-card.pl
index 44bf93cadaa..31a30365dc2 100755
--- a/Utils/gen-card.pl
+++ b/Utils/gen-card.pl
@@ -108,7 +108,7 @@ if (!exists $cards{$cardName}) {
 }
 
 # Check if card is already implemented
-my $fileName = "../Mage.Sets/src/mage/cards/".substr($cardName, 0, 1)."/".toCamelCase($cardName).".java";
+my $fileName = "../Mage.Sets/src/mage/cards/".lc(substr($cardName, 0, 1))."/".toCamelCase($cardName).".java";
 if(-e $fileName) {
   die "$cardName is already implemented.\n";
 }