diff --git a/lib/ceedling/configurator_setup.rb b/lib/ceedling/configurator_setup.rb
index a61fd65b..8587d604 100644
--- a/lib/ceedling/configurator_setup.rb
+++ b/lib/ceedling/configurator_setup.rb
@@ -175,7 +175,9 @@ def validate_backtrace(config)
     when :none
       # Do nothing
     when :simple
-      # Do nothing
+      # TODO: Remove when :simple support is completed
+      @loginator.log( ":project ↳ :use_backtrace => :simple is not yet supported", Verbosity::ERRORS )      
+      valid = false
     when :gdb
       # Do nothing
     else