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-rw-r--r--rts/TraverseHeap.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/rts/TraverseHeap.h b/rts/TraverseHeap.h
index a82bf0ec6d..ad1135519c 100644
--- a/rts/TraverseHeap.h
+++ b/rts/TraverseHeap.h
@@ -95,7 +95,7 @@ typedef struct traverseState_ {
* once you can simply return 'first_visit'.
*/
typedef bool (*visitClosure_cb) (
- const StgClosure *c,
+ StgClosure *c,
const StgClosure *cp,
const stackData data,
const bool first_visit,