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-rw-r--r--ext/strscan/extconf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/strscan/extconf.rb b/ext/strscan/extconf.rb
index abcbdb3ad2..3c311d2364 100644
--- a/ext/strscan/extconf.rb
+++ b/ext/strscan/extconf.rb
@@ -2,7 +2,7 @@
require 'mkmf'
if RUBY_ENGINE == 'ruby'
$INCFLAGS << " -I$(top_srcdir)" if $extmk
- have_func("onig_region_memsize")
+ have_func("onig_region_memsize(NULL)")
have_func("rb_reg_onig_match", "ruby/re.h")
create_makefile 'strscan'
else