diff --git a/lib/deprecated/runtime-core/doc/new-api/dynamicfunc.rs b/lib/deprecated/runtime-core/doc/new-api/dynamicfunc.rs
index 1a0d0bfe2..427e2a0b6 100644
--- a/lib/deprecated/runtime-core/doc/new-api/dynamicfunc.rs
+++ b/lib/deprecated/runtime-core/doc/new-api/dynamicfunc.rs
@@ -2,8 +2,8 @@ struct DynamicFunc {}
 
 impl DynamicFunc {
     fn new<F>(signature: &FuncSig, func: F) -> Self;
-    fn signature(&self) -> &FuncDescriptor;
+    fn signature(&self) -> &FuncSig;
     fn params(&self) -> &[Type];
     fn returns(&self) -> &[Type];
-    fn call(&self, params: &[Value] -> Result<Box<[Value]>, RuntimeError>;
+    fn call(&self, params: &[Value]) -> Result<Box<[Value]>, RuntimeError>;
 }
diff --git a/lib/deprecated/runtime-core/doc/new-api/dynfunc.rs b/lib/deprecated/runtime-core/doc/new-api/dynfunc.rs
index 6af22a984..3c7a31930 100644
--- a/lib/deprecated/runtime-core/doc/new-api/dynfunc.rs
+++ b/lib/deprecated/runtime-core/doc/new-api/dynfunc.rs
@@ -2,5 +2,5 @@ struct DynFunc {}
 
 impl DynFunc {
     fn call(&self, params: &[Value]) -> Result<Vec<Value>, CallError>;
-    fn signature(&self) -> &FuncDescriptor;
+    fn signature(&self) -> &FuncSig;
 }
diff --git a/lib/deprecated/runtime-core/doc/new-api/func.rs b/lib/deprecated/runtime-core/doc/new-api/func.rs
index b78d65a9d..bab0f7e6e 100644
--- a/lib/deprecated/runtime-core/doc/new-api/func.rs
+++ b/lib/deprecated/runtime-core/doc/new-api/func.rs
@@ -6,5 +6,5 @@ impl<Args, Rets> Func<Args, Rets> {
     fn returns(&self) -> &[Type];
     fn call(...) -> Result<Rets, RuntimeError>;
     fn dyn_call(&self, params: &[Value]) -> Result<Box<[Value]>, RuntimeError>;
-    fn signature(&self) -> &FuncDescriptor;
+    fn signature(&self) -> &FuncSig;
 }