diff --git a/lib/coffee-script/nodes.js b/lib/coffee-script/nodes.js
index bcdef0f5..9b363403 100644
--- a/lib/coffee-script/nodes.js
+++ b/lib/coffee-script/nodes.js
@@ -122,16 +122,19 @@
     };
 
     Base.prototype.toString = function(idt, name) {
-      var firstLine, lastLine, location, tree, _ref2, _ref3;
+      var firstLine, lastLine, location, tree;
       if (idt == null) {
         idt = '';
       }
       if (name == null) {
         name = this.constructor.name;
       }
-      firstLine = ((_ref2 = this.locationData) != null ? _ref2.first_line : void 0) || "unknown";
-      lastLine = ((_ref3 = this.locationData) != null ? _ref3.last_line : void 0) || "unknown";
-      location = firstLine + (lastLine !== firstLine ? "-" + lastLine : "") + ": ";
+      location = "";
+      if (this.locationData) {
+        firstLine = this.locationData.first_line + 1;
+        lastLine = this.locationData.last_line + 1;
+        location = firstLine + (lastLine !== firstLine ? "-" + lastLine : "") + ": ";
+      }
       tree = '\n' + idt + location + name;
       if (this.soak) {
         tree += '?';
diff --git a/src/nodes.coffee b/src/nodes.coffee
index cb93be07..ba0eb5ce 100644
--- a/src/nodes.coffee
+++ b/src/nodes.coffee
@@ -108,9 +108,11 @@ exports.Base = class Base
   # `toString` representation of the node, for inspecting the parse tree.
   # This is what `coffee --nodes` prints out.
   toString: (idt = '', name = @constructor.name) ->
-    firstLine = @locationData?.first_line || "unknown"
-    lastLine = @locationData?.last_line || "unknown"
-    location = firstLine  + (if lastLine != firstLine then "-" + lastLine else "") + ": "
+    location = ""
+    if @locationData
+      firstLine = @locationData.first_line + 1
+      lastLine = @locationData.last_line + 1
+      location = firstLine  + (if lastLine != firstLine then "-" + lastLine else "") + ": "
     tree = '\n' + idt + location + name
     tree += '?' if @soak
     @eachChild (node) -> tree += node.toString idt + TAB