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-rw-r--r--lib/mkmf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index b2ae7e501b..a6f77e043c 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1080,7 +1080,7 @@ site-install-rb: install-rb
rule = /^[$\w][^#]*:/ =~ line unless cont
cont = /(?:^|[^\\])(?:\\\\)*\\$/ =~ line
if rule
- line.gsub!(%r"(?<=\s)(?!\.)(?=[^\s\/]+\.(?:#{(SRC_EXT + ['h']).join('|')})(?\s|\z))"o, '{.;$(VPATH)}')
+ line.gsub!(%r"(?<=\s)(?!\.)(?=[^\s\/]+\.(?:#{(SRC_EXT + ['h']).join('|')})(?:\s|\z))"o, '{.;$(VPATH)}')
else
line.sub!(/^(\.\w+)(\.\w+)(?=\s*:)/, '{.;$(VPATH)}\1{}\2')
end