diff --git a/scripts/clean_aliases.pl b/scripts/clean_aliases.pl
index 77756f3..c7cf699 100644
--- a/scripts/clean_aliases.pl
+++ b/scripts/clean_aliases.pl
@@ -17,6 +17,10 @@ while(my $line = <$file_handle>)
     {
         $aliases{ $1 } = $2;
     }
+    else
+    {
+        print "Invalid alias:   $line"
+    }
 }
 close($file_handle);