diff --git a/ext/attach/extconf.rb b/ext/attach/extconf.rb
index 0556056..123b49e 100644
--- a/ext/attach/extconf.rb
+++ b/ext/attach/extconf.rb
@@ -1,4 +1,4 @@
-if defined?(RUBY_ENGINE) && 'rbx' == RUBY_ENGINE
+if defined?(RUBY_ENGINE) && RUBY_ENGINE != 'ruby'
   # create dummy Makefile to indicate success
   f = File.open(File.join(File.dirname(__FILE__), "Makefile"), "w")
   f.write("all:\n\techo all\ninstall:\n\techo installed\n")
diff --git a/ext/extconf.rb b/ext/extconf.rb
index ce56cb7..3465387 100644
--- a/ext/extconf.rb
+++ b/ext/extconf.rb
@@ -1,4 +1,4 @@
-if defined?(RUBY_ENGINE) && 'rbx' == RUBY_ENGINE
+if defined?(RUBY_ENGINE) && RUBY_ENGINE != 'ruby'
   # create dummy Makefile to indicate success
   f = File.open(File.join(File.dirname(__FILE__), "Makefile"), "w")
   f.write("all:\n\techo all\ninstall:\n\techo installed\n")
diff --git a/lib/debase.rb b/lib/debase.rb
index 4459835..f4d9956 100644
--- a/lib/debase.rb
+++ b/lib/debase.rb
@@ -1,5 +1,10 @@
 if defined?(RUBY_ENGINE) && 'rbx' == RUBY_ENGINE
   require 'debase/rbx'
+elsif defined?(RUBY_ENGINE) && RUBY_ENGINE == 'truffleruby'
+  require "debase/version"
+
+  Debugger = Module.new
+  return
 else
   require "debase_internals"
 end