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-rw-r--r--libguile/backtrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/backtrace.c b/libguile/backtrace.c
index a9b37fd7c..4dacae2b6 100644
--- a/libguile/backtrace.c
+++ b/libguile/backtrace.c
@@ -214,7 +214,7 @@ static void
display_frame_expr (char *hdr, SCM exp, char *tlr, int indentation, SCM sport, SCM port, scm_print_state *pstate)
{
int i = 0, n;
- scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (sport);
+ scm_t_ptob_descriptor *ptob = SCM_PORT_DESCRIPTOR (sport);
do
{
pstate->length = print_params[i].length;