diff --git a/src/handler/from_fn.rs b/src/handler/from_fn.rs
index 250ea34..0f672c4 100644
--- a/src/handler/from_fn.rs
+++ b/src/handler/from_fn.rs
@@ -58,8 +58,8 @@ where
     fn type_info(&self) -> Option<String> {
         Some(format!(
             "{{_PARAMS:{},_RETURN:{}}}",
-            <Self as HandlerTypes>::Params::inline(),
-            <Self as HandlerTypes>::Ok::inline(),
+            <Self as HandlerTypes>::Params::inline_flattened(),
+            <Self as HandlerTypes>::Ok::inline_flattened(),
         ))
     }
 }
@@ -183,8 +183,8 @@ where
     fn type_info(&self) -> Option<String> {
         Some(format!(
             "{{_PARAMS:{},_RETURN:{}}}",
-            <Self as HandlerTypes>::Params::inline(),
-            <Self as HandlerTypes>::Ok::inline(),
+            <Self as HandlerTypes>::Params::inline_flattened(),
+            <Self as HandlerTypes>::Ok::inline_flattened(),
         ))
     }
 }
@@ -295,8 +295,8 @@ where
     fn type_info(&self) -> Option<String> {
         Some(format!(
             "{{_PARAMS:{},_RETURN:{}}}",
-            <Self as HandlerTypes>::Params::inline(),
-            <Self as HandlerTypes>::Ok::inline(),
+            <Self as HandlerTypes>::Params::inline_flattened(),
+            <Self as HandlerTypes>::Ok::inline_flattened(),
         ))
     }
 }
diff --git a/src/handler/parent.rs b/src/handler/parent.rs
index 5513280..c2406ae 100644
--- a/src/handler/parent.rs
+++ b/src/handler/parent.rs
@@ -177,7 +177,7 @@ where
     InheritedParams: Send + Sync + 'static,
 {
     fn type_info(&self) -> Option<String> {
-        self.type_info_impl(&Params::inline())
+        self.type_info_impl(&Params::inline_flattened())
     }
 }
 #[cfg(feature = "ts-rs")]