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-rw-r--r--lib/rubygems/package/tar_header.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/rubygems/package/tar_header.rb b/lib/rubygems/package/tar_header.rb
index 28da1db0b5..f9ab13aca7 100644
--- a/lib/rubygems/package/tar_header.rb
+++ b/lib/rubygems/package/tar_header.rb
@@ -134,7 +134,7 @@ class Gem::Package::TarHeader
vals[:gid] ||= 0
vals[:mtime] ||= 0
vals[:checksum] ||= ""
- vals[:typeflag] ||= "0"
+ vals[:typeflag] = "0" if vals[:typeflag].nil? || vals[:typeflag].empty?
vals[:magic] ||= "ustar"
vals[:version] ||= "00"
vals[:uname] ||= "wheel"