diff --git a/strong-type-derive/src/detail/basic.rs b/strong-type-derive/src/detail/basic.rs
index 8c39757..e6a5ec6 100644
--- a/strong-type-derive/src/detail/basic.rs
+++ b/strong-type-derive/src/detail/basic.rs
@@ -11,10 +11,6 @@ pub(crate) fn implement_basic(
             pub fn new(value: impl Into<#value_type>) -> Self {
                 Self(value.into())
             }
-
-            pub const fn const_new(value: #value_type) -> Self {
-                Self(value)
-            }
         }
 
         impl StrongType for #name {
diff --git a/strong-type-derive/src/detail/basic_primitive.rs b/strong-type-derive/src/detail/basic_primitive.rs
index 01832db..99182ab 100644
--- a/strong-type-derive/src/detail/basic_primitive.rs
+++ b/strong-type-derive/src/detail/basic_primitive.rs
@@ -7,6 +7,10 @@ pub(crate) fn implement_basic_primitive(name: &syn::Ident, value_type: &syn::Ide
             pub fn value(&self) -> #value_type {
                 self.0
             }
+
+            pub const fn const_new(value: #value_type) -> Self {
+                Self(value)
+            }
         }
 
         impl Copy for #name {}