1 files changed, 1 insertions, 1 deletions

diff --git a/lib/int_sqrt.c b/lib/int_sqrt.c
index 14436f4ca6bd..30e0f9770f88 100644
--- a/lib/int_sqrt.c
+++ b/lib/int_sqrt.c
@@ -52,7 +52,7 @@ u32 int_sqrt64(u64 x)
         if (x <= ULONG_MAX)
                 return int_sqrt((unsigned long) x);
 
-        m = 1ULL << (fls64(x) & ~1ULL);
+        m = 1ULL << ((fls64(x) - 1) & ~1ULL);
         while (m != 0) {
                 b = y + m;
                 y >>= 1;