diff --git a/core/modules/widgets/edit/editors/texteditor.js b/core/modules/widgets/edit/editors/texteditor.js
index 2a237a3c7..5a417201c 100644
--- a/core/modules/widgets/edit/editors/texteditor.js
+++ b/core/modules/widgets/edit/editors/texteditor.js
@@ -85,6 +85,7 @@ TextEditor.prototype.render = function() {
 		this.editWidget.attributes["class"] += " " + this.editWidget.renderer.parseTreeNode.attributes["class"].value;
 	}
 	if(this.editWidget.renderer.parseTreeNode.attributes.style) {
+		this.editWidget.attributes.style = this.editWidget.attributes.style || "";
 		this.editWidget.attributes.style += this.editWidget.renderer.parseTreeNode.attributes.style.value;
 	}
 	this.editWidget.children = this.editWidget.renderer.renderTree.createRenderers(this.editWidget.renderer.renderContext,[node]);