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-rw-r--r--erts/emulator/beam/erl_thr_progress.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_thr_progress.h b/erts/emulator/beam/erl_thr_progress.h
index 0e63d41fda..1416aa6166 100644
--- a/erts/emulator/beam/erl_thr_progress.h
+++ b/erts/emulator/beam/erl_thr_progress.h
@@ -134,6 +134,7 @@ typedef struct {
typedef int ErtsThrPrgrDelayHandle;
#define ERTS_THR_PRGR_DHANDLE_MANAGED ((ErtsThrPrgrDelayHandle) -1)
/* ERTS_THR_PRGR_DHANDLE_MANAGED implies managed thread */
+#define ERTS_THR_PRGR_DHANDLE_INVALID ((ErtsThrPrgrDelayHandle) -2)
extern ErtsThrPrgr erts_thr_prgr__;