diff --git a/src/internal_macros.rs b/src/internal_macros.rs
index 53ce2d60..188de28f 100644
--- a/src/internal_macros.rs
+++ b/src/internal_macros.rs
@@ -202,7 +202,7 @@ macro_rules! serde_string_impl {
                         self.visit_str(v)
                     }
 
-                    fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
+                    fn visit_string<E>(self, v: $crate::prelude::String) -> Result<Self::Value, E>
                     where
                         E: $crate::serde::de::Error,
                     {
@@ -264,7 +264,7 @@ macro_rules! serde_struct_human_string_impl {
                             self.visit_str(v)
                         }
 
-                        fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
+                        fn visit_string<E>(self, v: $crate::prelude::String) -> Result<Self::Value, E>
                         where
                             E: $crate::serde::de::Error,
                         {