diff --git a/Library/Homebrew/test/unpack_strategy/tar_spec.rb b/Library/Homebrew/test/unpack_strategy/tar_spec.rb
index 6e41d232ef..d47df7b76e 100644
--- a/Library/Homebrew/test/unpack_strategy/tar_spec.rb
+++ b/Library/Homebrew/test/unpack_strategy/tar_spec.rb
@@ -62,8 +62,8 @@ RSpec.describe UnpackStrategy::Tar do
       }
     end
 
-    it "uses a stable locale for tar diagnostics" do
-      expect(strategy).to receive(:system_command!).with("tar", hash_including(env: { "LC_ALL" => "C" }))
+    it "uses a UTF-8 locale for tar so non-ASCII paths can be extracted" do
+      expect(strategy).to receive(:system_command!).with("tar", hash_including(env: { "LC_ALL" => "en_US.UTF-8" }))
 
       strategy.extract(to: unpack_dir)
     end
diff --git a/Library/Homebrew/unpack_strategy/tar.rb b/Library/Homebrew/unpack_strategy/tar.rb
index 49b0abbc08..2d8f063704 100644
--- a/Library/Homebrew/unpack_strategy/tar.rb
+++ b/Library/Homebrew/unpack_strategy/tar.rb
@@ -52,9 +52,10 @@ module UnpackStrategy
                         args:    ["--extract", "--no-same-owner",
                                   "--file", tar_path,
                                   "--directory", unpack_dir],
-                        # Keep tar diagnostics in English so that out of space error handle in
-                        # `‎unpack_strategy.rb` can recognize out-of-space errors.
-                        env:     { "LC_ALL" => "C" },
+                        # Keep tar diagnostics in English so that `unpack_strategy.rb` can
+                        # recognize out-of-space errors, while using a UTF-8 character set so
+                        # that archives containing non-ASCII paths can be extracted.
+                        env:     { "LC_ALL" => "en_US.UTF-8" },
                         verbose:
       end
     end