diff --git a/rtems/config/rtems-bsp.cfg b/rtems/config/rtems-bsp.cfg
index dd34b0a..9d22050 100644
--- a/rtems/config/rtems-bsp.cfg
+++ b/rtems/config/rtems-bsp.cfg
@@ -9,7 +9,7 @@
 #
 # Keeping the package's installed path in the RTEMS install path
 # and separate to the tools lets the tools version vary
-# independently.
+# independently. If --with-tools is not provided use the prefix.
 #
 
 %if %{_host} == %{nil}
@@ -17,11 +17,11 @@
 %endif
 
 %ifn %{defined with_rtems_bsp}
- %error No RTEMS BSP specified: --with-rtems-bsp=bsp
+ %define with_tools %{_prefix}
 %endif
 
 %ifn %{defined with_tools}
- %error No RTEMS tools specified: --with-tools=path
+
 %endif
 
 #