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-rw-r--r--thread_win32.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/thread_win32.c b/thread_win32.c
index 6e9f18f..af9d351 100644
--- a/thread_win32.c
+++ b/thread_win32.c
@@ -23,6 +23,7 @@
#define ubf_wakeup_all_threads() do {} while (0)
#define ubf_threads_empty() (1)
#define ubf_timer_disarm() do {} while (0)
+#define ubf_list_atfork() do {} while (0)
static volatile DWORD ruby_native_thread_key = TLS_OUT_OF_INDEXES;