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-rw-r--r--ext/extmk.rb.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/extmk.rb.in b/ext/extmk.rb.in
index a2ff7c63aba..847e34f87e1 100644
--- a/ext/extmk.rb.in
+++ b/ext/extmk.rb.in
@@ -472,7 +472,7 @@ if $cache_mod
end
exit if $install or $clean
-$extinit += ""
+$extinit = "" unless $extinit
if $extlist.size > 0
for s,t in $extlist
f = format("%s/%s.o", s, t)