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-rw-r--r--rts/Threads.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/rts/Threads.c b/rts/Threads.c
index 501c7514c7..d578cc29c7 100644
--- a/rts/Threads.c
+++ b/rts/Threads.c
@@ -84,7 +84,7 @@ createThread(Capability *cap, nat size)
size = MIN_STACK_WORDS + TSO_STRUCT_SIZEW;
}
- stack_size = size - TSO_STRUCT_SIZEW;
+ stack_size = round_to_mblocks(size) - TSO_STRUCT_SIZEW;
tso = (StgTSO *)allocateLocal(cap, size);
TICK_ALLOC_TSO(stack_size, 0);