diff --git a/query.php b/query.php
index 6f1e497..15529fd 100644
--- a/query.php
+++ b/query.php
@@ -2791,6 +2791,11 @@ public function get_results( $cols = array(), $where_cols = array(), $limit = 25
 			return null;
 		}
 
+		// Get all columns, if specified.
+		if ( '*' === $cols ) {
+			$cols = $this->get_column_names();
+		}
+
 		// Fetch all the columns for the table being queried.
 		$column_names = $this->get_column_names();