diff --git a/rtems/config/rtems-bsp.cfg b/rtems/config/rtems-bsp.cfg
index 9d22050..b1a782e 100644
--- a/rtems/config/rtems-bsp.cfg
+++ b/rtems/config/rtems-bsp.cfg
@@ -17,11 +17,11 @@
 %endif
 
 %ifn %{defined with_rtems_bsp}
- %define with_tools %{_prefix}
+ %error No RTEMS BSP specified: --with-rtems-bsp=bsp
 %endif
 
 %ifn %{defined with_tools}
-
+ %define with_tools %{_prefix}
 %endif
 
 #