diff --git a/lib/cmock_generator_plugin_cexception.rb b/lib/cmock_generator_plugin_cexception.rb
index a757669..b3ea13a 100644
--- a/lib/cmock_generator_plugin_cexception.rb
+++ b/lib/cmock_generator_plugin_cexception.rb
@@ -12,6 +12,7 @@ class CMockGeneratorPluginCexception
     @config = config
     @utils = utils
     @priority = 7
+    raise 'Error: cexception is not supported without setjmp support' unless @config.has_setjmp_h
   end
 
   def include_files