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-rw-r--r--libguile/frames.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/libguile/frames.c b/libguile/frames.c
index 62ba23fff..2e83cde9a 100644
--- a/libguile/frames.c
+++ b/libguile/frames.c
@@ -124,7 +124,7 @@ SCM_DEFINE (scm_frame_num_locals, "frame-num-locals", 1, 0, 0,
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p[0] == (SCM)0)
+ if (SCM_UNPACK (p[0]) == 0)
/* skip over not-yet-active frame */
p += 3;
else
@@ -154,7 +154,7 @@ SCM_DEFINE (scm_frame_local_ref, "frame-local-ref", 2, 0, 0,
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p[0] == (SCM)0)
+ if (SCM_UNPACK (p[0]) == 0)
/* skip over not-yet-active frame */
p += 3;
else if (n == i)
@@ -186,7 +186,7 @@ SCM_DEFINE (scm_frame_local_set_x, "frame-local-set!", 3, 0, 0,
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p[0] == (SCM)0)
+ if (SCM_UNPACK (p[0]) == 0)
/* skip over not-yet-active frame */
p += 3;
else if (n == i)