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-rw-r--r--ext/posix_mq/extconf.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/posix_mq/extconf.rb b/ext/posix_mq/extconf.rb
index e890276..b9e8963 100644
--- a/ext/posix_mq/extconf.rb
+++ b/ext/posix_mq/extconf.rb
@@ -3,6 +3,7 @@ require "mkmf"
 have_header("sys/select.h")
 have_header("signal.h")
 have_header("mqueue.h") or abort "mqueue.h header missing"
+have_func("__mq_oshandle")
 have_func("rb_str_set_len")
 have_func("rb_struct_alloc_noinit")
 have_func('rb_thread_blocking_region')