diff --git a/src/core/fast_hdlparam.rs b/src/core/fast_hdlparam.rs
index 8bf3926..36f0cd7 100644
--- a/src/core/fast_hdlparam.rs
+++ b/src/core/fast_hdlparam.rs
@@ -1,18 +1,18 @@
 use serde::Serialize;
 
-#[derive(Debug, Clone, Serialize)]
+#[derive(Debug, Clone, Serialize, PartialEq)]
 pub struct Position {
     pub line: u32,
     pub character: u32
 }
 
-#[derive(Debug, Clone, Serialize)]
+#[derive(Debug, Clone, Serialize, PartialEq)]
 pub struct Range {
     pub start: Position,
     pub end: Position
 }
 
-#[derive(Debug, Serialize)]
+#[derive(Debug, Serialize, PartialEq)]
 pub struct Port {
     pub name: String,
     pub dir_type: String,
@@ -22,7 +22,7 @@ pub struct Port {
     pub range: Range
 }
 
-#[derive(Debug, Serialize)]
+#[derive(Debug, Serialize, PartialEq)]
 pub struct Parameter {
     pub name: String,
     pub net_type: String,
@@ -123,6 +123,7 @@ impl FastHdlparam {
             }
         };
         last_module.ports.push(port);
+        last_module.ports.dedup();
     }
 
     pub fn add_instance(&mut self, name: &str, inst_type: &str, line: u32, character: u32, end_character: u32,
diff --git a/src/core/sv_parser.rs b/src/core/sv_parser.rs
index af609a0..e7feba9 100644
--- a/src/core/sv_parser.rs
+++ b/src/core/sv_parser.rs
@@ -24,7 +24,6 @@ pub fn make_fast_from_syntaxtree(syntax_tree: SyntaxTree) -> FastHdlparam {
     let mut hdlparam = FastHdlparam {
         fast: Vec::new()
     };
-    let mut nonansi_port_locate = HashMap::new();
     let mut ansi_port_last_dir = "";
 
     let content = syntax_tree.text.text().split('\n')
@@ -79,13 +78,6 @@ pub fn make_fast_from_syntaxtree(syntax_tree: SyntaxTree) -> FastHdlparam {
                     _ => ()
                 }
             }
-            RefNode::Port(x) => {
-                let id = unwrap_node!(x, SimpleIdentifier).unwrap();
-                let locate = get_identifier(id).unwrap();
-                let name = syntax_tree.get_str(&locate.clone()).unwrap();
-                // println!("get port {} {:?}", name, locate);
-                nonansi_port_locate.insert(name, locate);
-            }
             RefNode::PortDeclaration(x) => {
                 let id = unwrap_node!(x, InputDeclaration, OutputDeclaration, InoutDeclaration).unwrap();
                 let id = get_identifier(id).unwrap();
@@ -108,18 +100,20 @@ pub fn make_fast_from_syntaxtree(syntax_tree: SyntaxTree) -> FastHdlparam {
                     _ => "1".to_string()
                 };
 
-                let id = unwrap_node!(x, PortIdentifier).unwrap();
-                let id = get_identifier(id).unwrap();
-                let name = syntax_tree.get_str(&id).unwrap();
-                let (start_line, start_character, end_line, end_character) = if nonansi_port_locate.contains_key(name) {
-                    let start_character = get_column_by_offset(&content, nonansi_port_locate[name].offset);
-                    (nonansi_port_locate[name].line, start_character as u32,
-                        nonansi_port_locate[name].line, (start_character + nonansi_port_locate[name].len) as u32)
-                } else {
-                    (dir_line, dir_character, id.line, (get_column_by_offset(&content, id.offset) + id.len) as u32)
-                };
+                if let Some(RefNode::ListOfPortIdentifiers(x)) = unwrap_node!(x, ListOfPortIdentifiers) {
+                    for node in x {
+                        if let RefNode::PortIdentifier(x) = node {
+                            let id = unwrap_node!(x, Identifier).unwrap();
+                            let id = get_identifier(id).unwrap();
+                            let name = syntax_tree.get_str(&id).unwrap();
+                            let (start_line, start_character, end_line, end_character) = 
+                                (dir_line, dir_character, id.line, (get_column_by_offset(&content, id.offset) + id.len) as u32);
 
-                hdlparam.add_port(name, dir_type, net_type, width.as_str(), start_line, start_character, end_line, end_character);
+                            hdlparam.add_port(name, dir_type, net_type, width.as_str(), start_line, start_character,
+                                            end_line, end_character);
+                        }
+                    }
+                }
             }
             RefNode::AnsiPortDeclaration(x) => {
                 let id = unwrap_node!(x, PortIdentifier).unwrap();
diff --git a/sv-parser b/sv-parser
index af11f5f..4960ea3 160000
--- a/sv-parser
+++ b/sv-parser
@@ -1 +1 @@
-Subproject commit af11f5ff1ef091562d2b17cdf4de3614aedf2286
+Subproject commit 4960ea3fb7c848462ce6e78dbae454ffc775803f