diff --git a/rtu/config.lua b/rtu/config.lua
index 7dc1baa..80f9e9e 100644
--- a/rtu/config.lua
+++ b/rtu/config.lua
@@ -12,7 +12,7 @@ config.LOG_PATH = "/log.txt"
 --  0 = APPEND (adds to existing file on start)
 --  1 = NEW (replaces existing file on start)
 config.LOG_MODE = 0
--- RTU peripheral devices (named: side/network device name)
+-- RTU peripheral devices (name: side/network device name)
 config.RTU_DEVICES = {
     {
         name = "boilerValve_0",
diff --git a/rtu/startup.lua b/rtu/startup.lua
index 2306bcd..d87b0ff 100644
--- a/rtu/startup.lua
+++ b/rtu/startup.lua
@@ -25,7 +25,7 @@ local sna_rtu      = require("rtu.dev.sna_rtu")
 local sps_rtu      = require("rtu.dev.sps_rtu")
 local turbinev_rtu = require("rtu.dev.turbinev_rtu")
 
-local RTU_VERSION = "beta-v0.9.8"
+local RTU_VERSION = "beta-v0.9.9"
 
 local rtu_t = types.rtu_t
 
@@ -257,9 +257,9 @@ local function main()
                 return false
             end
 
-            -- CHECK: reactor is an integer >= 1
-            if (not util.is_int(for_reactor)) or (for_reactor <= 0) then
-                println(util.c("configure> device entry #", i, ": reactor ", for_reactor, " isn't an integer >= 1"))
+            -- CHECK: reactor is an integer >= 0
+            if (not util.is_int(for_reactor)) or (for_reactor < 0) then
+                println(util.c("configure> device entry #", i, ": reactor ", for_reactor, " isn't an integer >= 0"))
                 return false
             end
 
@@ -362,7 +362,12 @@ local function main()
 
             table.insert(units, rtu_unit)
 
-            log.debug(util.c("configure> initialized RTU unit #", #units, ": ", name, " (", rtu_type, ") [", index, "] for reactor ", for_reactor))
+            local for_message = "facility"
+            if for_reactor > 0 then
+                for_message = util.c("reactor ", for_reactor)
+            end
+
+            log.debug(util.c("configure> initialized RTU unit #", #units, ": ", name, " (", rtu_type, ") [", index, "] for ", for_message))
         end
 
         -- we made it through all that trusting-user-to-write-a-config-file chaos