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-rw-r--r--lib/rubygems/installer.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rubygems/installer.rb b/lib/rubygems/installer.rb
index 8c286605e1..7cc9bc6a0b 100644
--- a/lib/rubygems/installer.rb
+++ b/lib/rubygems/installer.rb
@@ -68,7 +68,7 @@ class Gem::Installer
@path_warning = false
- @install_lock = Mutex.new
+ @install_lock = Thread::Mutex.new
class << self
##