1 files changed, 1 insertions, 1 deletions
diff --git a/t/op/pack.t b/t/op/pack.t
index c513a4d940..57c6a648cf 100755
--- a/t/op/pack.t
+++ b/t/op/pack.t
@@ -43,7 +43,7 @@ if ($no_signedness) {
 }
 
 for my $size ( 16, 32, 64 ) {
-  if (exists $Config{"u${size}size"} and $Config{"u${size}size"} != ($size >> 3)) {
+  if (defined $Config{"u${size}size"} and $Config{"u${size}size"} != ($size >> 3)) {
     push @valid_errors, qr/^Perl_my_$maybe_not_avail$size\(\) not available/;
   }
 }