diff --git a/public/app/plugins/datasource/graphite/lexer.js b/public/app/plugins/datasource/graphite/lexer.js
index 457100b163e..2b8affd04e2 100644
--- a/public/app/plugins/datasource/graphite/lexer.js
+++ b/public/app/plugins/datasource/graphite/lexer.js
@@ -367,6 +367,14 @@ define([
       }
 
       switch (id) {
+      case 'true': {
+        type = 'bool';
+        break;
+      }
+      case 'false': {
+        type = 'bool';
+        break;
+      }
       default:
         type = "identifier";
       }
@@ -379,7 +387,7 @@ define([
 
     },
 
-      /*
+    /*
      * Extract a numeric literal out of the next sequence of
      * characters or return 'null' if its not possible. This method
      * supports all numeric literals described in section 7.8.3
diff --git a/public/app/plugins/datasource/graphite/parser.js b/public/app/plugins/datasource/graphite/parser.js
index 2ff15cda5b0..43fd148f1ea 100644
--- a/public/app/plugins/datasource/graphite/parser.js
+++ b/public/app/plugins/datasource/graphite/parser.js
@@ -156,6 +156,17 @@ define([
       return node;
     },
 
+    boolExpression: function() {
+      if (!this.match('bool')) {
+        return null;
+      }
+
+      return {
+        type: 'bool',
+        value: this.consumeToken().value === 'true',
+      };
+    },
+
     functionParameters: function () {
       if (this.match(')') || this.match('')) {
         return [];
@@ -165,6 +176,7 @@ define([
         this.functionCall() ||
         this.numericLiteral() ||
         this.seriesRefExpression() ||
+        this.boolExpression() ||
         this.metricExpression() ||
         this.stringLiteral();
 
diff --git a/public/app/plugins/datasource/graphite/queryCtrl.js b/public/app/plugins/datasource/graphite/queryCtrl.js
index c3ed7fe32a1..0880dc23dc9 100644
--- a/public/app/plugins/datasource/graphite/queryCtrl.js
+++ b/public/app/plugins/datasource/graphite/queryCtrl.js
@@ -87,6 +87,7 @@ function (angular, _, config, gfunc, Parser) {
       case 'series-ref':
         addFunctionParameter(func, astNode.value, index, $scope.segments.length > 0);
         break;
+      case 'bool':
       case 'string':
       case 'number':
         if ((index-1) >= func.def.params.length) {
diff --git a/public/test/specs/lexer-specs.js b/public/test/specs/lexer-specs.js
index b6167314a5a..b04f36740ff 100644
--- a/public/test/specs/lexer-specs.js
+++ b/public/test/specs/lexer-specs.js
@@ -109,6 +109,14 @@ define([
       expect(tokens[4].value).to.be('0.002');
     });
 
+    it('should handle bool parameters', function() {
+      var lexer = new Lexer("alias(metric, true, false)");
+      var tokens = lexer.tokenize();
+      expect(tokens[4].type).to.be('bool');
+      expect(tokens[4].value).to.be('true');
+      expect(tokens[6].type).to.be('bool');
+    });
+
   });
 
 });
diff --git a/public/test/specs/parser-specs.js b/public/test/specs/parser-specs.js
index d52250a4b1b..bfcb238c3cf 100644
--- a/public/test/specs/parser-specs.js
+++ b/public/test/specs/parser-specs.js
@@ -165,6 +165,15 @@ define([
       expect(rootNode.params[1].value).to.be('#B');
     });
 
+    it('series parameters, issue 2788', function() {
+      var parser = new Parser("summarize(diffSeries(#A, #B), '10m', 'sum', false)");
+      var rootNode = parser.getAst();
+      expect(rootNode.type).to.be('function');
+      expect(rootNode.params[0].type).to.be('function');
+      expect(rootNode.params[1].value).to.be('10m');
+      expect(rootNode.params[3].type).to.be('bool');
+    });
+
     it('should parse metric expression with ip number segments', function() {
       var parser = new Parser('5.10.123.5');
       var rootNode = parser.getAst();