diff --git a/src/js/simplemde.js b/src/js/simplemde.js
index 016d693..11cb85d 100644
--- a/src/js/simplemde.js
+++ b/src/js/simplemde.js
@@ -779,8 +779,8 @@ function togglePreview(editor) {
 			toolbar.className += " active";
 			toolbar_div.className += " disabled-for-preview";
 		}
+		preview.innerHTML = editor.options.previewRender(editor.value(), preview);
 	}
-	preview.innerHTML = editor.options.previewRender(editor.value(), preview);
 
 	// Turn off side by side if needed
 	var sidebyside = cm.getWrapperElement().nextSibling;
@@ -2025,4 +2025,4 @@ SimpleMDE.prototype.toTextArea = function() {
 	}
 };
 
-module.exports = SimpleMDE;
\ No newline at end of file
+module.exports = SimpleMDE;