diff --git a/Configure b/Configure
index bf0c2d5f97..f46be6b4e5 100755
--- a/Configure
+++ b/Configure
@@ -2344,7 +2344,7 @@ EOF
             my %dirs = ();
             my $pd = dirname($product);
 
-            foreach (@{$unified_info{sources}->{$product}},
+            foreach (@{$unified_info{sources}->{$product} // []},
                      @{$unified_info{shared_sources}->{$product} // []}) {
                 my $d = dirname($_);