diff --git a/app/controllers/Ublog.scala b/app/controllers/Ublog.scala
index 91cf34046f..9e07015240 100644
--- a/app/controllers/Ublog.scala
+++ b/app/controllers/Ublog.scala
@@ -229,7 +229,7 @@ final class Ublog(env: Env) extends LilaController(env) {
   def topic(str: String, page: Int) = Open { implicit ctx =>
     NotForKids {
       Reasonable(page, 15) {
-        UblogPost.Topic.get(str) ?? { top =>
+        UblogPost.Topic.fromUrl(str) ?? { top =>
           env.ublog.paginator.liveByTopic(top, page) map { posts =>
             Ok(html.ublog.index.topic(top, posts))
           }
diff --git a/app/views/ublog/post.scala b/app/views/ublog/post.scala
index 448159f250..25183616f1 100644
--- a/app/views/ublog/post.scala
+++ b/app/views/ublog/post.scala
@@ -93,7 +93,7 @@ object post {
         ),
         div(cls := "ublog-post__topics")(
           post.topics.map { topic =>
-            a(href := routes.Ublog.topic(topic.value, 1))(topic.value)
+            a(href := routes.Ublog.topic(topic.url, 1))(topic.value)
           }
         ),
         strong(cls := "ublog-post__intro")(post.intro),
diff --git a/conf/routes b/conf/routes
index 2b74a60a7d..28a00e4ace 100644
--- a/conf/routes
+++ b/conf/routes
@@ -97,13 +97,13 @@ GET   /blog                            controllers.Blog.index(page: Int ?= 1)
 GET   /blog/all                        controllers.Blog.all
 GET   /blog/$year<2\d{3}>              controllers.Blog.year(year: Int)
 GET   /blog/discuss/:id                controllers.Blog.discuss(id: String)
+GET   /blog/topic/:topic               controllers.Ublog.topic(topic: String, page: Int ?= 1)
 GET   /blog/:id/:slug                  controllers.Blog.show(id: String, slug: String, ref: Option[String] ?= None)
 GET   /blog.atom                       controllers.Blog.atom
 GET   /blog.txt                        controllers.Blog.sitemapTxt
 GET   /blog/friends                    controllers.Ublog.friends(page: Int ?= 1)
 GET   /blog/liked                      controllers.Ublog.liked(page: Int ?= 1)
 GET   /blog/community                  controllers.Ublog.community(page: Int ?= 1)
-GET   /blog/topic                      controllers.Ublog.topic(topic: String, page: Int ?= 1)
 
 # Training - Coordinate
 GET   /training/coordinate             controllers.Coordinate.home
diff --git a/modules/ublog/src/main/UblogPost.scala b/modules/ublog/src/main/UblogPost.scala
index 974415fc44..6727ad5ffd 100644
--- a/modules/ublog/src/main/UblogPost.scala
+++ b/modules/ublog/src/main/UblogPost.scala
@@ -32,7 +32,9 @@ object UblogPost {
 
   case class Recorded(by: User.ID, at: DateTime)
 
-  case class Topic(value: String) extends AnyVal with StringValue
+  case class Topic(value: String) extends StringValue {
+    val url = value.replace(" ", "_")
+  }
 
   object Topic {
     val all = List(
@@ -59,6 +61,7 @@ object UblogPost {
     val exists                   = all.toSet
     def get(str: String)         = exists(str) option Topic(str)
     def fromStrList(str: String) = str.split(',').toList.flatMap(get).distinct
+    def fromUrl(str: String)     = get(str.replace("_", " "))
   }
 
   case class Likes(value: Int)     extends AnyVal