diff --git a/src/rpcclient/rpcclient/client.py b/src/rpcclient/rpcclient/client.py
index c9f48c9..ef9f8c8 100644
--- a/src/rpcclient/rpcclient/client.py
+++ b/src/rpcclient/rpcclient/client.py
@@ -301,11 +301,11 @@ def symbol(self, symbol: int):
         return Symbol.create(symbol, self)
 
     @property
-    def errno(self):
+    def errno(self) -> int:
         return self.symbols.errno[0]
 
     @errno.setter
-    def errno(self, value):
+    def errno(self, value: int) -> None:
         self.symbols.errno[0] = value
 
     @property
diff --git a/src/rpcclient/rpcclient/darwin/client.py b/src/rpcclient/rpcclient/darwin/client.py
index a38a573..3314933 100644
--- a/src/rpcclient/rpcclient/darwin/client.py
+++ b/src/rpcclient/rpcclient/darwin/client.py
@@ -106,6 +106,18 @@ def interactive(self, additional_namespace: typing.Mapping = None):
         additional_namespace['CFSTR'] = self.cf
         super().interactive(additional_namespace=additional_namespace)
 
+    @property
+    def errno(self) -> int:
+        p_error = self.symbols.__error()
+        p_error.item_size = 4
+        return p_error[0]
+
+    @errno.setter
+    def errno(self, value: int) -> None:
+        p_error = self.symbols.__error()
+        p_error.item_size = 4
+        p_error[0] = value
+
     @property
     def images(self) -> typing.List[DyldImage]:
         m = []