js/plugins/drupalentity/plugin.js | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/js/plugins/drupalentity/plugin.js b/js/plugins/drupalentity/plugin.js
index 0638ff9..a1b5c10 100644
--- a/js/plugins/drupalentity/plugin.js
+++ b/js/plugins/drupalentity/plugin.js
@@ -154,17 +154,18 @@
 
         _setUpDynamicEditables() {
           // Now that the caption is available in the DOM, make it editable.
-          this.initEditable('caption', this.definition.editables.caption);
-          // And ensure that any changes made to it are persisted.
-          var captionDomNode = this.editables.caption.$;
-          var config = { characterData: true, attributes: false, childList: true, subtree: true };
-          var widget = this;
-          this.captionEditableMutationObserver = new MutationObserver(function() {
-            var entityAttributes = CKEDITOR.tools.clone(widget.data.attributes);
-            entityAttributes['data-caption'] = captionDomNode.innerHTML;
-            widget.setData('attributes', entityAttributes);
-          });
-          this.captionEditableMutationObserver.observe(captionDomNode, config);
+          if (this.initEditable('caption', this.definition.editables.caption)) {
+            // And ensure that any changes made to it are persisted.
+            var captionDomNode = this.editables.caption.$;
+            var config = {characterData: true, attributes: false, childList: true, subtree: true};
+            var widget = this;
+            this.captionEditableMutationObserver = new MutationObserver(function () {
+              var entityAttributes = CKEDITOR.tools.clone(widget.data.attributes);
+              entityAttributes['data-caption'] = captionDomNode.innerHTML;
+              widget.setData('attributes', entityAttributes);
+            });
+            this.captionEditableMutationObserver.observe(captionDomNode, config);
+          }
         },
 
         _tearDownDynamicEditables() {