diff --git a/fixed_wide/src/types.rs b/fixed_wide/src/types.rs
index 37ba47f..ef49abb 100644
--- a/fixed_wide/src/types.rs
+++ b/fixed_wide/src/types.rs
@@ -1,2 +1,2 @@
-pub type I256F128=crate::wide::FixedI256<typenum::consts::U128>;
-pub type I512F256=crate::wide::FixedI512<typenum::consts::U256>;
+pub type I128F128=crate::wide::FixedI256<typenum::consts::U128>;
+pub type I256F256=crate::wide::FixedI512<typenum::consts::U256>;
diff --git a/src/lib.rs b/src/lib.rs
index 9e67f80..1d4be86 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,8 +2,8 @@ use fixed_wide::wide::WideMul;
 
 type Planar64=fixed::types::I32F32;
 type Planar64Wide1=fixed::types::I64F64;
-type Planar64Wide2=fixed_wide::types::I256F128;
-type Planar64Wide3=fixed_wide::types::I512F256;
+type Planar64Wide2=fixed_wide::types::I128F128;
+type Planar64Wide3=fixed_wide::types::I256F256;
 
 #[cfg(test)]
 mod tests {