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-rw-r--r--toys/pending/bc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/toys/pending/bc.c b/toys/pending/bc.c
index bb5d86cb..b38d9872 100644
--- a/toys/pending/bc.c
+++ b/toys/pending/bc.c
@@ -1717,6 +1717,7 @@ static BcStatus bc_num_p(BcNum *a, BcNum *b, BcNum *c, size_t scale) {
if (b->rdx) return bc_vm_err(BC_ERROR_MATH_NON_INTEGER);
if (!b->len) {
+ if (b->neg) return bc_vm_err(BC_ERROR_MATH_DIVIDE_BY_ZERO);
bc_num_one(c);
return BC_STATUS_SUCCESS;
}