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-rw-r--r--libguile/ports.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/libguile/ports.c b/libguile/ports.c
index c0e13f374..2f9945349 100644
--- a/libguile/ports.c
+++ b/libguile/ports.c
@@ -541,8 +541,7 @@ register_finalizer_for_port (SCM port)
/* Register a finalizer for PORT so that its iconv CDs get freed and
optionally its type's `free' function gets called. */
- GC_REGISTER_FINALIZER_NO_ORDER (SCM_HEAP_OBJECT_BASE (port),
- finalize_port, 0,
+ GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (port), finalize_port, 0,
&prev_finalizer,
&prev_finalization_data);
}