diff --git a/internal/php5/php5.go b/internal/php5/php5.go
index 56f92ea..ad07c76 100644
Binary files a/internal/php5/php5.go and b/internal/php5/php5.go differ
diff --git a/internal/php5/php5.y b/internal/php5/php5.y
index 22a845a..d801635 100644
--- a/internal/php5/php5.y
+++ b/internal/php5/php5.y
@@ -2041,15 +2041,23 @@ parameter:
                 yylex.(*Parser).setFreeFloating(variable, token.Start, $4.SkippedTokens)
 
                 if $3 != nil {
-                    variable = &ast.Variadic{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($3, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $3.SkippedTokens)
+                    variable = &ast.Variadic{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($3, $4),
+                        },
+                        VariadicTkn: $3,
+                        Var:         variable,
+                    }
                 }
 
                 if $2 != nil {
-                    variable = &ast.Reference{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($2, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $2.SkippedTokens)
+                    variable = &ast.Reference{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($2, $4),
+                        },
+                        AmpersandTkn: $2,
+                        Var:          variable,
+                    }
                 }
 
                 $$ = &ast.Parameter{ast.Node{}, $1, variable, nil}
@@ -2081,15 +2089,23 @@ parameter:
                 yylex.(*Parser).setFreeFloating(variable, token.End, $5.SkippedTokens)
 
                 if $3 != nil {
-                    variable = &ast.Variadic{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($3, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $3.SkippedTokens)
+                    variable = &ast.Variadic{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($3, $4),
+                        },
+                        VariadicTkn: $3,
+                        Var:         variable,
+                    }
                 }
 
                 if $2 != nil {
-                    variable = &ast.Reference{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($2, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $2.SkippedTokens)
+                    variable = &ast.Reference{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($2, $4),
+                        },
+                        AmpersandTkn: $2,
+                        Var:          variable,
+                    }
                 }
 
                 $$ = &ast.Parameter{ast.Node{}, $1, variable, $6}
diff --git a/internal/php7/php7.go b/internal/php7/php7.go
index 4876d91..a3ed309 100644
Binary files a/internal/php7/php7.go and b/internal/php7/php7.go differ
diff --git a/internal/php7/php7.y b/internal/php7/php7.y
index 0bfff99..602859b 100644
--- a/internal/php7/php7.y
+++ b/internal/php7/php7.y
@@ -1865,15 +1865,23 @@ parameter:
                 yylex.(*Parser).setFreeFloating(variable, token.Start, $4.SkippedTokens)
 
                 if $3 != nil {
-                    variable = &ast.Variadic{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($3, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $3.SkippedTokens)
+                    variable = &ast.Variadic{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($3, $4),
+                        },
+                        VariadicTkn: $3,
+                        Var:         variable,
+                    }
                 }
 
                 if $2 != nil {
-                    variable = &ast.Reference{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($2, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $2.SkippedTokens)
+                    variable = &ast.Reference{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($2, $4),
+                        },
+                        AmpersandTkn: $2,
+                        Var:          variable,
+                    }
                 }
 
                 $$ = &ast.Parameter{ast.Node{}, $1, variable, nil}
@@ -1905,15 +1913,23 @@ parameter:
                 yylex.(*Parser).setFreeFloating(variable, token.End, $5.SkippedTokens)
 
                 if $3 != nil {
-                    variable = &ast.Variadic{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($3, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $3.SkippedTokens)
+                    variable = &ast.Variadic{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($3, $4),
+                        },
+                        VariadicTkn: $3,
+                        Var:         variable,
+                    }
                 }
 
                 if $2 != nil {
-                    variable = &ast.Reference{ast.Node{}, variable}
-                    variable.GetNode().Position = position.NewTokensPosition($2, $4)
-                    yylex.(*Parser).setFreeFloating(variable, token.Start, $2.SkippedTokens)
+                    variable = &ast.Reference{
+                        Node: ast.Node{
+                            Position: position.NewTokensPosition($2, $4),
+                        },
+                        AmpersandTkn: $2,
+                        Var:          variable,
+                    }
                 }
 
                 $$ = &ast.Parameter{ast.Node{}, $1, variable, $6}
diff --git a/pkg/ast/node.go b/pkg/ast/node.go
index eaf4930..5242bf6 100644
--- a/pkg/ast/node.go
+++ b/pkg/ast/node.go
@@ -44,7 +44,8 @@ func (n *Nullable) Accept(v NodeVisitor) {
 // Reference node
 type Reference struct {
 	Node
-	Var Vertex
+	AmpersandTkn *token.Token
+	Var          Vertex
 }
 
 func (n *Reference) Accept(v NodeVisitor) {
@@ -54,7 +55,8 @@ func (n *Reference) Accept(v NodeVisitor) {
 // Variadic node
 type Variadic struct {
 	Node
-	Var Vertex
+	VariadicTkn *token.Token
+	Var         Vertex
 }
 
 func (n *Variadic) Accept(v NodeVisitor) {