diff --git a/fixed_wide/src/fixed.rs b/fixed_wide/src/fixed.rs
index 446d957..a8bf944 100644
--- a/fixed_wide/src/fixed.rs
+++ b/fixed_wide/src/fixed.rs
@@ -708,7 +708,11 @@ macro_rules! impl_not_const_generic{
 				let wide_self=self.[<fix_ $_2n>]();
 				//descend down the bits and check if flipping each bit would push the square over the input value
 				for shift in (0..=max_shift).rev(){
-					let new_result=result|Self::from_bits(BInt::from_bits(bnum::BUint::power_of_two(shift)));
+					let new_result={
+						let mut bits=result.to_bits().to_bits();
+						bits.set_bit(shift,true);
+						Self::from_bits(BInt::from_bits(bits))
+					};
 					if new_result.[<wide_mul_ $n _ $n>](new_result)<=wide_self{
 						result=new_result;
 					}