diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f4d760a..b871223a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,6 +22,7 @@
 * Fix #637 customize Bulma
 * Fix #584 loading select
 * Fix #571 control height
+* Fix #634 is-grouped control
 
 ## 0.4.0
 
diff --git a/sass/elements/form.sass b/sass/elements/form.sass
index a9b9f79d..5787ed0f 100644
--- a/sass/elements/form.sass
+++ b/sass/elements/form.sass
@@ -226,7 +226,6 @@ $input-radius:              $radius !default
     display: flex
     justify-content: flex-start
     & > .control
-      flex-basis: 0
       flex-shrink: 0
       &:not(:last-child)
         margin-bottom: 0