diff --git a/modules/compiler_vm/compiler_client.pl b/modules/compiler_vm/compiler_client.pl
index c852199d..33b826a1 100755
--- a/modules/compiler_vm/compiler_client.pl
+++ b/modules/compiler_vm/compiler_client.pl
@@ -23,10 +23,10 @@ if(not defined $sock) {
 my $nick = shift @ARGV;
 my $code = join ' ', @ARGV;
 
-my $lang = "C11";
+my $lang = "c11";
 
 if($code =~ s/-lang=([^ ]+)//) {
-  $lang = uc $1;
+  $lang = lc $1;
 }
 
 print $sock "compile:$nick:$lang\n";