diff --git a/Configure b/Configure
index 21811113c6a6424ebacabeacf807a2a25ec248e9..c84722a4e6ae64a7324754d5aeb74ae7365582f2 100755
--- a/Configure
+++ b/Configure
@@ -2257,7 +2257,7 @@ EOF
             my %dirs = ();
             my $pd = dirname($product);
 
-            foreach (@{$unified_info{sources}->{$product}},
+            foreach (@{$unified_info{sources}->{$product} // []},
                      @{$unified_info{shared_sources}->{$product} // []}) {
                 my $d = dirname($_);