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-rw-r--r--ext/pathname/lib/pathname.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/pathname/lib/pathname.rb b/ext/pathname/lib/pathname.rb
index 3baf818f08..7fb923c6ae 100644
--- a/ext/pathname/lib/pathname.rb
+++ b/ext/pathname/lib/pathname.rb
@@ -503,6 +503,7 @@ class Pathname
# ArgumentError is raised when it cannot find a relative path.
#
def relative_path_from(base_directory)
+ base_directory = Pathname.new(base_directory) unless Pathname === base_directory
dest_directory = self.cleanpath.to_s
base_directory = base_directory.cleanpath.to_s
dest_prefix = dest_directory