1 files changed, 1 insertions, 1 deletions

diff --git a/coreutils/factor.c b/coreutils/factor.c
index 90e9ed761..4df523f28 100644
--- a/coreutils/factor.c
+++ b/coreutils/factor.c
@@ -136,7 +136,7 @@ static void factorize(wide_t N);
 
 static half_t isqrt_odd(wide_t N)
 {
-        half_t s = isqrt(N);
+        half_t s = isqrt_ull(N);
         /* s^2 is <= N, (s+1)^2 > N */
 
         /* If s^2 in fact is EQUAL to N, it's very lucky.