diff --git a/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css b/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
index 04ec3e08d4..ea19a0e6a8 100644
--- a/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
+++ b/src/wp-includes/js/tinymce/skins/wordpress/wp-content.css
@@ -15,7 +15,7 @@ html.ios {
 
 body {
 	font-family: Georgia, "Times New Roman", "Bitstream Charter", Times, serif;
-	font-size: 100%;
+	font-size: 16px;
 	line-height: 1.5;
 	color: #333;
 	margin: 9px 10px;