diff --git a/contrib/crossrpms/configure.ac b/contrib/crossrpms/configure.ac
index 838b1f9f16..271ef4cac3 100644
--- a/contrib/crossrpms/configure.ac
+++ b/contrib/crossrpms/configure.ac
@@ -27,7 +27,8 @@ case "$prefix" in
   build_infos=1
   rpmprefix="rtems-"
   ;;
-NONE) # Default prefix
+NONE|${ac_default_prefix}) # Default prefix
+echo "DEFAULT:$prefix"
   build_infos=1
   rpmprefix="[rtems-]RTEMS_API[-]"
   ;;