diff --git a/wp-includes/class-wp-network-query.php b/wp-includes/class-wp-network-query.php
index dfef0b3322..646491fbec 100644
--- a/wp-includes/class-wp-network-query.php
+++ b/wp-includes/class-wp-network-query.php
@@ -208,7 +208,12 @@ class WP_Network_Query {
 		do_action_ref_array( 'pre_get_networks', array( &$this ) );
 
 		// $args can include anything. Only use the args defined in the query_var_defaults to compute the key.
-		$key = md5( serialize( wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) ) ) );
+		$_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) );
+
+		// Ignore the $fields argument as the queried result will be the same regardless.
+		unset( $_args['fields'] );
+
+		$key = md5( serialize( $_args ) );
 		$last_changed = wp_cache_get_last_changed( 'networks' );
 
 		$cache_key = "get_network_ids:$key:$last_changed";
diff --git a/wp-includes/version.php b/wp-includes/version.php
index eeb9926147..82a810c1fe 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41062';
+$wp_version = '4.9-alpha-41063';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.