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-rw-r--r--rts/StgMiscClosures.cmm2
1 files changed, 1 insertions, 1 deletions
diff --git a/rts/StgMiscClosures.cmm b/rts/StgMiscClosures.cmm
index 1bc6dc6a2b..c665749632 100644
--- a/rts/StgMiscClosures.cmm
+++ b/rts/StgMiscClosures.cmm
@@ -272,7 +272,7 @@ retry:
("ptr" msg) = foreign "C" allocate(MyCapability() "ptr",
BYTES_TO_WDS(SIZEOF_MessageBlackHole)) [R1];
- StgHeader_info(msg) = stg_MSG_BLACKHOLE_info;
+ SET_HDR(msg, stg_MSG_BLACKHOLE_info, CCS_SYSTEM);
MessageBlackHole_tso(msg) = CurrentTSO;
MessageBlackHole_bh(msg) = R1;