1 files changed, 2 insertions, 0 deletions
diff --git a/lib/irb/init.rb b/lib/irb/init.rb
index 5409528fae..09099f88b7 100644
--- a/lib/irb/init.rb
+++ b/lib/irb/init.rb
@@ -158,6 +158,8 @@ module IRB # :nodoc:
     @CONF[:LC_MESSAGES] = Locale.new
 
     @CONF[:AT_EXIT] = []
+
+    @CONF[:COMMAND_ALIASES] = {}
   end
 
   def IRB.set_measure_callback(type = nil, arg = nil, &block)