diff --git a/wp-includes/class-walker-category.php b/wp-includes/class-walker-category.php
index 341c98c142..c01b19beb0 100644
--- a/wp-includes/class-walker-category.php
+++ b/wp-includes/class-walker-category.php
@@ -99,7 +99,7 @@ class Walker_Category extends Walker {
 		);
 
 		// Don't generate an element if the category name is empty.
-		if ( ! $cat_name ) {
+		if ( '' === $cat_name ) {
 			return;
 		}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 466226db3c..e853b2bc8f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9.9-alpha-43619';
+$wp_version = '4.9.9-alpha-43620';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.