diff --git a/lib/bundle/bundle.rb b/lib/bundle/bundle.rb
index ffb0b6f90..c249dbb6f 100644
--- a/lib/bundle/bundle.rb
+++ b/lib/bundle/bundle.rb
@@ -14,7 +14,7 @@ def system(cmd, *args, verbose: false)
           logs << buf
         end
         Process.wait(pipe.pid)
-        success = $CHILD_STATUS.success?
+        success = $CHILD_STATUS.dup.success?
         pipe.close
       end
       puts logs.join unless success