diff --git a/backend/app/migrator/disqus.go b/backend/app/migrator/disqus.go
index 7da2e6c8..0dab4b23 100644
--- a/backend/app/migrator/disqus.go
+++ b/backend/app/migrator/disqus.go
@@ -138,7 +138,7 @@ func (d *Disqus) convert(r io.Reader, siteID string) (ch chan store.Comment) {
 						Imported:  true,
 					}
 					if comment.AuthorUserName == "" { // empty comment.AuthorUserName from disqus
-						c.User.ID = "disqus_" + c.User.Name
+						c.User.ID = "disqus_" + store.EncodeID(c.User.Name)
 					}
 					if c.ID == "" { // no comment.UID
 						c.ID = comment.ID
diff --git a/backend/app/migrator/disqus_test.go b/backend/app/migrator/disqus_test.go
index cd8dbdab..8ad9c573 100644
--- a/backend/app/migrator/disqus_test.go
+++ b/backend/app/migrator/disqus_test.go
@@ -43,7 +43,7 @@ func TestDisqus_Import(t *testing.T) {
 
 	c = last[1] // get comment with empty username
 	assert.Equal(t, "No Username", c.User.Name)
-	assert.Equal(t, "disqus_No Username", c.User.ID)
+	assert.Equal(t, "disqus_62e24ea213756cda0339e1074819f15e25214361", c.User.ID)
 
 	posts, err := dataStore.List("test", 0, 0)
 	assert.NoError(t, err)