diff --git a/tutorial/tutorial.wmml b/tutorial/tutorial.wmml
index 4908600c44b045ccbade4b682b1e465ea386ef2c..04f934770b0cd42c39acfda9ea633c2267b3699b 100644
--- a/tutorial/tutorial.wmml
+++ b/tutorial/tutorial.wmml
@@ -3704,7 +3704,7 @@ to move files around.
 
 <method name=open_socket title="open a socket">
 <man_syntax>
-int open_socket(int|void port, int|void address);<br>
+int open_socket(int|void port, string|void address);<br>
 </man_syntax>
 <man_description>
 This makes this file into a socket ready for connection. The reason