diff --git a/winsup/utils/mingw/cygcheck.cc b/winsup/utils/mingw/cygcheck.cc
index b5bad4ec2..9d6f19203 100644
--- a/winsup/utils/mingw/cygcheck.cc
+++ b/winsup/utils/mingw/cygcheck.cc
@@ -2645,7 +2645,7 @@ package_info (char **search, int selector)
     return 1;
 
   if ((selector & INFO_ALL) == 0)
-    selector = INFO_ALL;
+    selector |= INFO_ALL;
 
   inst_pkgs = get_installed_packages (NULL, &inst_pkg_count);