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-rw-r--r--lib/mutex_m.gemspec7
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/mutex_m.gemspec b/lib/mutex_m.gemspec
index 73ed183b85..409ed5b7b2 100644
--- a/lib/mutex_m.gemspec
+++ b/lib/mutex_m.gemspec
@@ -1,4 +1,9 @@
-require_relative "mutex_m"
+begin
+ require_relative "lib/mutex_m"
+rescue LoadError
+ # for Ruby core repository
+ require_relative "mutex_m"
+end
Gem::Specification.new do |spec|
spec.name = "mutex_m"