diff --git a/.gitignore b/.gitignore
index 3f1af7895..39d9341e1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,5 @@ node_modules
 # Editor backup files
 *.bak
 *~
-web/content/assets/js/jison.js
\ No newline at end of file
+web/content/assets/js/jison.js
+.idea
diff --git a/lib/jison.js b/lib/jison.js
index d078056ee..d08ddb0a6 100755
--- a/lib/jison.js
+++ b/lib/jison.js
@@ -1493,7 +1493,8 @@ _handle_error:
                     text: lexer.match,
                     token: this.terminals_[symbol] || symbol,
                     line: lexer.yylineno,
-                    loc: yyloc,
+                    loc: lexer.yylloc,
+                    ruleId: stack.slice(stack.length - 2, stack.length).join('_'),
                     expected: expected,
                     recoverable: (error_rule_depth !== false)
                 });
diff --git a/ports/comments.js b/ports/comments.js
index 0633a2f21..e641a0656 100644
--- a/ports/comments.js
+++ b/ports/comments.js
@@ -142,7 +142,7 @@ parse: function parse(input) {
                 } else {
                     errStr = "Parse error on line " + (yylineno + 1) + ": Unexpected " + (symbol == 1?"end of input":"'" + (this.terminals_[symbol] || symbol) + "'");
                 }
-                this.parseError(errStr, {text: this.lexer.match, token: this.terminals_[symbol] || symbol, line: this.lexer.yylineno, loc: yyloc, expected: expected});
+                this.parseError(errStr, {text: this.lexer.match, token: this.terminals_[symbol] || symbol, line: this.lexer.yylineno, loc: this.lexer.yylloc, expected: expected});
             }
         }
         if (action[0] instanceof Array && action.length > 1) {
diff --git a/ports/csharp/Jison/Jison/Test/formula.js b/ports/csharp/Jison/Jison/Test/formula.js
index e040e4acd..b7bfcd03e 100644
--- a/ports/csharp/Jison/Jison/Test/formula.js
+++ b/ports/csharp/Jison/Jison/Test/formula.js
@@ -696,7 +696,7 @@ _handle_error:
 						text: this.lexer.match,
 						token: this.terminals_[symbol] || symbol,
 						line: this.lexer.yylineno,
-						loc: yyloc,
+						loc: this.lexer.yylloc,
 						expected: expected,
                         recoverable: (error_rule_depth !== false)
 				});