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-rw-r--r--libguile/control.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/control.c b/libguile/control.c
index dc3fed250..9121d1791 100644
--- a/libguile/control.c
+++ b/libguile/control.c
@@ -163,7 +163,7 @@ reify_partial_continuation (SCM vm, SCM prompt, SCM extwinds,
/* Since non-escape continuations should begin with a thunk application, the
first bit of the stack should be a frame, with the saved fp equal to the fp
that was current when the prompt was made. */
- if ((SCM*)(SCM_PROMPT_REGISTERS (prompt)->sp[1])
+ if ((SCM*)SCM_UNPACK (SCM_PROMPT_REGISTERS (prompt)->sp[1])
!= SCM_PROMPT_REGISTERS (prompt)->fp)
abort ();