diff --git a/core/themes/classy/css/components/container-inline.css b/core/themes/classy/css/components/container-inline.css
index 785e4de9d0519c8febb079f5760ee528457ce387..d0e35872a26a479e6bb79884f675826623d4fabc 100644
--- a/core/themes/classy/css/components/container-inline.css
+++ b/core/themes/classy/css/components/container-inline.css
@@ -7,10 +7,12 @@
 .container-inline .label:after {
   content: ':';
 }
-.form-type-radios .container-inline label:after {
+.form-type-radios .container-inline label:after,
+.form-type-checkboxes .container-inline label:after {
   content: '';
 }
-.form-type-radios .container-inline .form-type-radio {
+.form-type-radios .container-inline .form-type-radio,
+.form-type-checkboxes .container-inline .form-type-checkbox {
   margin: 0 1em;
 }
 .container-inline .form-actions,
diff --git a/core/themes/seven/css/components/container-inline.css b/core/themes/seven/css/components/container-inline.css
index a1968dc023f773eb2fde2be5b2e8a75c736aa318..8881ed8e685f7a9e220f37325b0245456df68245 100644
--- a/core/themes/seven/css/components/container-inline.css
+++ b/core/themes/seven/css/components/container-inline.css
@@ -3,13 +3,16 @@
  * Inline items.
  */
 
-.container-inline .form-radios label:after {
+.container-inline .form-radios label:after,
+.container-inline .form-checkboxes label:after {
   content: '';
 }
-.container-inline .form-radios .form-type-radio {
+.container-inline .form-radios .form-type-radio,
+.container-inline .form-checkboxes .form-type-checkbox {
   margin-right: 1em;
 }
-[dir="rtl"] .container-inline .form-radios .form-type-radio {
+[dir="rtl"] .container-inline .form-radios .form-type-radio,
+[dir="rtl"] .container-inline .form-checkboxes .form-type-checkbox {
   margin-right: 0;
   margin-left: 1em;
 }