diff --git a/web-components/packages/carbon-web-components/src/components/data-table/table.ts b/web-components/packages/carbon-web-components/src/components/data-table/table.ts
index bfeecd55269c..31ce2eb0392b 100644
--- a/web-components/packages/carbon-web-components/src/components/data-table/table.ts
+++ b/web-components/packages/carbon-web-components/src/components/data-table/table.ts
@@ -168,7 +168,7 @@ class CDSTable extends HostListenerMixin(LitElement) {
    */
   @property()
   filterRows = (rowText: string, searchString: string) =>
-    rowText.toLowerCase().indexOf(searchString) < 0;
+    rowText.toLowerCase().indexOf(searchString.toLowerCase()) < 0;
 
   /**
    * The total headers