diff --git a/fixed_wide/src/fixed.rs b/fixed_wide/src/fixed.rs
index cffdd1a..0e45545 100644
--- a/fixed_wide/src/fixed.rs
+++ b/fixed_wide/src/fixed.rs
@@ -238,11 +238,10 @@ macro_rules! impl_from_float {
 							//extract exponent, add fractional offset
 							//usize is used to calculate digit_index. exp_cycle must be at least 8 bits so 32 bits is fine
 							let exp=((bits>>($mantissa_bits-1)) as usize&((1<<$exponent_bits)-1))+F;
-							//digit_index is where the hi digit should end up in a fixed point number
 							//if it's less than zero, that's a conversion underflow.
-							let digit_index=exp.checked_sub($exp_bias)?>>DIGIT_SHIFT;
+							let exp_bias=exp.checked_sub($exp_bias)?;
 							//cycle the exponent to keep the top bit of the mantissa within the hi digit
-							let exp_cycle=exp.overflowing_sub($exp_bias+64).0.rem_euclid(64).overflowing_add($exp_bias+64).0;
+							let exp_cycle=exp_bias.rem_euclid(64).overflowing_add($exp_bias+64).0;
 							let out_bits=
 								bits
 								//remove (mask) sign bit and exponent
@@ -253,7 +252,8 @@ macro_rules! impl_from_float {
 							let _128=<$input>::from_bits(out_bits) as u128;
 							Some(FloatInfo{
 								sign:f.is_sign_negative(),
-								digit_index,
+								//digit_index is where the hi digit should end up in a fixed point number
+								digit_index:exp_bias>>DIGIT_SHIFT,
 								bits:[_128 as u64,(_128>>64) as u64],
 							})
 						}