diff --git a/core/Piranha.AttributeBuilder/PageTypeBuilder.cs b/core/Piranha.AttributeBuilder/PageTypeBuilder.cs
index b3673aeac..6486be0a3 100644
--- a/core/Piranha.AttributeBuilder/PageTypeBuilder.cs
+++ b/core/Piranha.AttributeBuilder/PageTypeBuilder.cs
@@ -128,11 +128,20 @@ protected override PageType GetContentType(Type type)
                     foreach (PageTypeRouteAttribute route in routes)
                     {
                         if (!string.IsNullOrWhiteSpace(route.Title) && !string.IsNullOrWhiteSpace(route.Route))
-                            pageType.Routes.Add(new ContentTypeRoute
+                        {
+                            var contentRoute = new ContentTypeRoute
                             {
                                 Title = route.Title,
                                 Route = route.Route
-                            });
+                            };
+
+                            // Make sure the route starts with a forward slash
+                            if (!contentRoute.Route.StartsWith("/"))
+                            {
+                                contentRoute.Route = $"/{ contentRoute.Route }";
+                            }
+                            pageType.Routes.Add(contentRoute);
+                        }
                     }
 
                     // Add default custom editors
diff --git a/core/Piranha.AttributeBuilder/PostTypeBuilder.cs b/core/Piranha.AttributeBuilder/PostTypeBuilder.cs
index 6957ddd0b..964210fba 100644
--- a/core/Piranha.AttributeBuilder/PostTypeBuilder.cs
+++ b/core/Piranha.AttributeBuilder/PostTypeBuilder.cs
@@ -128,11 +128,18 @@ protected override PostType GetContentType(Type type)
                     {
                         if (!string.IsNullOrWhiteSpace(route.Title) && !string.IsNullOrWhiteSpace(route.Route))
                         {
-                            postType.Routes.Add(new ContentTypeRoute
+                            var contentRoute = new ContentTypeRoute
                             {
                                 Title = route.Title,
                                 Route = route.Route
-                            });
+                            };
+
+                            // Make sure the route starts with a forward slash
+                            if (!contentRoute.Route.StartsWith("/"))
+                            {
+                                contentRoute.Route = $"/{ contentRoute.Route }";
+                            }
+                            postType.Routes.Add(contentRoute);
                         }
                     }
 
diff --git a/test/Piranha.Tests/AttributeBuilder/TypeBuilderTests.cs b/test/Piranha.Tests/AttributeBuilder/TypeBuilderTests.cs
index 5a8b1016f..656c79f92 100644
--- a/test/Piranha.Tests/AttributeBuilder/TypeBuilderTests.cs
+++ b/test/Piranha.Tests/AttributeBuilder/TypeBuilderTests.cs
@@ -27,6 +27,12 @@ public class SimplePageType
             public Extend.Fields.TextField Body { get; set; }
         }
 
+        [PageType(Id = "Routed", Title = "Routed Page Type")]
+        [PageTypeRoute(Title = "Default", Route = "pageroute")]
+        public class RoutedPageType
+        {
+        }
+
         [PageType(Id = "Archive", Title = "Archive Page Type", UseBlocks = false, IsArchive = true)]
         [PageTypeArchiveItem(typeof(SimplePostType))]
         public class ArchivePageType
@@ -64,6 +70,12 @@ public class SimplePostType
             public Extend.Fields.TextField Body { get; set; }
         }
 
+        [PostType(Id = "Routed", Title = "Routed Post Type")]
+        [PostTypeRoute(Title = "Default", Route = "postroute")]
+        public class RoutedPostType
+        {
+        }
+
         [PostType(Id = "Complex", Title = "Complex Post Type")]
         [PostTypeRoute(Title = "Default", Route = "/complex")]
         [PostTypeEditor(Title = "Custom Editor", Component = "will be replaced", Icon = "will be replaced")]
@@ -159,6 +171,24 @@ public async Task AddSimplePageType()
             }
         }
 
+        [Fact]
+        public async Task AddForwardSlashToPageRoutes()
+        {
+            using (var api = CreateApi())
+            {
+                var builder = new PageTypeBuilder(api)
+                    .AddType(typeof(RoutedPageType));
+                builder.Build();
+
+                var type = await api.PageTypes.GetByIdAsync("Routed");
+
+                Assert.NotNull(type);
+
+                Assert.NotEmpty(type.Routes);
+                Assert.StartsWith("/", type.Routes[0]);
+            }
+        }
+
         [Fact]
         public async Task AddArchivePageType()
         {
@@ -241,6 +271,24 @@ public async Task AddSimplePostType()
             }
         }
 
+        [Fact]
+        public async Task AddForwardSlashToPostRoutes()
+        {
+            using (var api = CreateApi())
+            {
+                var builder = new PostTypeBuilder(api)
+                    .AddType(typeof(RoutedPostType));
+                builder.Build();
+
+                var type = await api.PostTypes.GetByIdAsync("Routed");
+
+                Assert.NotNull(type);
+
+                Assert.NotEmpty(type.Routes);
+                Assert.StartsWith("/", type.Routes[0]);
+            }
+        }
+
         [Fact]
         public async Task AddComplexPostType()
         {