diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index 65c1a5fe3..b24b35cf2 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -1350,6 +1350,10 @@ canvas.tc-edit-bitmapeditor  {
 	display: block;
 }
 
+.tc-tiddler-body {
+	overflow-x: auto;
+}
+
 .tc-single-tiddler-window .tc-tiddler-body,
 .tc-tiddler-frame .tc-tiddler-body {
 	font-size: {{$:/themes/tiddlywiki/vanilla/metrics/bodyfontsize}};
@@ -2220,6 +2224,7 @@ html body.tc-body.tc-single-tiddler-window {
 
 .tc-tab-content {
 	margin-top: 14px;
+	overflow-x: auto;
 }
 
 .tc-tab-content.tc-vertical  {