diff --git a/autoload/vimlparser.vim b/autoload/vimlparser.vim
index 2bf0f9c..7e82044 100644
--- a/autoload/vimlparser.vim
+++ b/autoload/vimlparser.vim
@@ -1515,6 +1515,7 @@ function! s:VimLParser.parse_heredoc() abort
 
   while s:TRUE
     call self.reader.skip_white()
+    let pos = self.reader.getpos()
     let key = self.reader.read_word()
     if key == ''
       break
@@ -1523,7 +1524,10 @@ function! s:VimLParser.parse_heredoc() abort
       let node.op = key
       break
     else
-      call add(node.rlist, key)
+      let keynode = s:Node(s:NODE_STRING)
+      let keynode.pos = pos
+      let keynode.value = key
+      call add(node.rlist, keynode)
     endif
   endwhile
   if node.op ==# ''
@@ -1534,11 +1538,15 @@ function! s:VimLParser.parse_heredoc() abort
     if self.reader.peek() ==# '<EOF>'
       break
     endif
+    let pos = self.reader.getpos()
     let line = self.reader.getn(-1)
     if line ==# node.op
       return node
     endif
-    call add(node.body, line)
+    let linenode = s:Node(s:NODE_STRING)
+    let linenode.pos = pos
+    let linenode.value = line
+    call add(node.body, linenode)
     call self.reader.get()
   endwhile
   throw s:Err(printf("E990: Missing end marker '%s'", node.op), self.reader.getpos())
@@ -5590,12 +5598,12 @@ function! s:Compiler.compile_heredoc(node) abort
   if empty(a:node.rlist)
     let rlist = '(list)'
   else
-    let rlist = '(list ' . join(map(a:node.rlist, 'self.escape_string(v:val)'), ' ') . ')'
+    let rlist = '(list ' . join(map(a:node.rlist, 'self.escape_string(v:val.value)'), ' ') . ')'
   endif
   if empty(a:node.body)
     let body = '(list)'
   else
-    let body = '(list ' . join(map(a:node.body, 'self.escape_string(v:val)'), ' ') . ')'
+    let body = '(list ' . join(map(a:node.body, 'self.escape_string(v:val.value)'), ' ') . ')'
   endif
   let op = self.escape_string(a:node.op)
   return printf('(heredoc %s %s %s)', rlist, op, body)
diff --git a/js/vimlparser.js b/js/vimlparser.js
index c8f2b93..608ee9f 100644
--- a/js/vimlparser.js
+++ b/js/vimlparser.js
@@ -1809,6 +1809,7 @@ VimLParser.prototype.parse_heredoc = function() {
     node.body = [];
     while (TRUE) {
         this.reader.skip_white();
+        var pos = this.reader.getpos();
         var key = this.reader.read_word();
         if (key == "") {
             break;
@@ -1818,7 +1819,10 @@ VimLParser.prototype.parse_heredoc = function() {
             break;
         }
         else {
-            viml_add(node.rlist, key);
+            var keynode = Node(NODE_STRING);
+            keynode.pos = pos;
+            keynode.value = key;
+            viml_add(node.rlist, keynode);
         }
     }
     if (node.op == "") {
@@ -1829,11 +1833,15 @@ VimLParser.prototype.parse_heredoc = function() {
         if (this.reader.peek() == "<EOF>") {
             break;
         }
+        var pos = this.reader.getpos();
         var line = this.reader.getn(-1);
         if (line == node.op) {
             return node;
         }
-        viml_add(node.body, line);
+        var linenode = Node(NODE_STRING);
+        linenode.pos = pos;
+        linenode.value = line;
+        viml_add(node.body, linenode);
         this.reader.get();
     }
     throw Err(viml_printf("E990: Missing end marker '%s'", node.op), this.reader.getpos());
@@ -5094,13 +5102,13 @@ Compiler.prototype.compile_heredoc = function(node) {
         var rlist = "(list)";
     }
     else {
-        var rlist = "(list " + viml_join(node.rlist.map((function(vval) { return this.escape_string(vval); }).bind(this)), " ") + ")";
+        var rlist = "(list " + viml_join(node.rlist.map((function(vval) { return this.escape_string(vval.value); }).bind(this)), " ") + ")";
     }
     if (viml_empty(node.body)) {
         var body = "(list)";
     }
     else {
-        var body = "(list " + viml_join(node.body.map((function(vval) { return this.escape_string(vval); }).bind(this)), " ") + ")";
+        var body = "(list " + viml_join(node.body.map((function(vval) { return this.escape_string(vval.value); }).bind(this)), " ") + ")";
     }
     var op = this.escape_string(node.op);
     return viml_printf("(heredoc %s %s %s)", rlist, op, body);
diff --git a/py/vimlparser.py b/py/vimlparser.py
index abe3330..b192204 100644
--- a/py/vimlparser.py
+++ b/py/vimlparser.py
@@ -1488,6 +1488,7 @@ def parse_heredoc(self):
         node.body = []
         while TRUE:
             self.reader.skip_white()
+            pos = self.reader.getpos()
             key = self.reader.read_word()
             if key == "":
                 break
@@ -1495,17 +1496,24 @@ def parse_heredoc(self):
                 node.op = key
                 break
             else:
-                viml_add(node.rlist, key)
+                keynode = Node(NODE_STRING)
+                keynode.pos = pos
+                keynode.value = key
+                viml_add(node.rlist, keynode)
         if node.op == "":
             raise VimLParserException(Err("E172: Missing marker", self.reader.getpos()))
         self.parse_trail()
         while TRUE:
             if self.reader.peek() == "<EOF>":
                 break
+            pos = self.reader.getpos()
             line = self.reader.getn(-1)
             if line == node.op:
                 return node
-            viml_add(node.body, line)
+            linenode = Node(NODE_STRING)
+            linenode.pos = pos
+            linenode.value = line
+            viml_add(node.body, linenode)
             self.reader.get()
         raise VimLParserException(Err(viml_printf("E990: Missing end marker '%s'", node.op), self.reader.getpos()))
 
@@ -4054,11 +4062,11 @@ def compile_heredoc(self, node):
         if viml_empty(node.rlist):
             rlist = "(list)"
         else:
-            rlist = "(list " + viml_join([self.escape_string(vval) for vval in node.rlist], " ") + ")"
+            rlist = "(list " + viml_join([self.escape_string(vval.value) for vval in node.rlist], " ") + ")"
         if viml_empty(node.body):
             body = "(list)"
         else:
-            body = "(list " + viml_join([self.escape_string(vval) for vval in node.body], " ") + ")"
+            body = "(list " + viml_join([self.escape_string(vval.value) for vval in node.body], " ") + ")"
         op = self.escape_string(node.op)
         return viml_printf("(heredoc %s %s %s)", rlist, op, body)