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-rw-r--r--ext/unicorn_http/extconf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/unicorn_http/extconf.rb b/ext/unicorn_http/extconf.rb
index 7a1b0cd..1da0282 100644
--- a/ext/unicorn_http/extconf.rb
+++ b/ext/unicorn_http/extconf.rb
@@ -5,6 +5,7 @@ have_macro("SIZEOF_OFF_T", "ruby.h") or check_sizeof("off_t", "sys/types.h")
 have_macro("SIZEOF_SIZE_T", "ruby.h") or check_sizeof("size_t", "sys/types.h")
 have_macro("SIZEOF_LONG", "ruby.h") or check_sizeof("long", "sys/types.h")
 have_func("rb_str_set_len", "ruby.h")
+have_func("rb_hash_clear", "ruby.h") # Ruby 2.0+
 have_func("gmtime_r", "time.h")
 
 create_makefile("unicorn_http")