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-rw-r--r--libguile/unif.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/unif.c b/libguile/unif.c
index 8fbe4b7a8..8357a63ce 100644
--- a/libguile/unif.c
+++ b/libguile/unif.c
@@ -2021,7 +2021,7 @@ scm_array_to_list (v)
long *data = (long *) SCM_VELTS (v);
register unsigned long mask;
for (k = (SCM_LENGTH (v) - 1) / SCM_LONG_BIT; k > 0; k--)
- for (mask = 1L << (SCM_LONG_BIT - 1); mask; mask >>= 1)
+ for (mask = 1UL << (SCM_LONG_BIT - 1); mask; mask >>= 1)
res = scm_cons (((long *) data)[k] & mask ? SCM_BOOL_T : SCM_BOOL_F, res);
for (mask = 1L << ((SCM_LENGTH (v) % SCM_LONG_BIT) - 1); mask; mask >>= 1)
res = scm_cons (((long *) data)[k] & mask ? SCM_BOOL_T : SCM_BOOL_F, res);