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-rw-r--r--lib/irb/init.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/irb/init.rb b/lib/irb/init.rb
index dd888f3727..55453cc8f7 100644
--- a/lib/irb/init.rb
+++ b/lib/irb/init.rb
@@ -45,7 +45,7 @@ module IRB # :nodoc:
@CONF[:USE_SINGLELINE] = false unless defined?(ReadlineInputMethod)
@CONF[:USE_COLORIZE] = (nc = ENV['NO_COLOR']).nil? || nc.empty?
- @CONF[:USE_AUTOCOMPLETE] = true
+ @CONF[:USE_AUTOCOMPLETE] = ENV.fetch("IRB_USE_AUTOCOMPLETE", "true") != "false"
@CONF[:INSPECT_MODE] = true
@CONF[:USE_TRACER] = false
@CONF[:USE_LOADER] = false