diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index d8cfa324f9..6075f09b51 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -263,6 +263,10 @@ function size_format( $bytes, $decimals = 0 ) {
 		'B'  => 1,
 	);
 
+	if ( 0 === $bytes ) {
+		return number_format_i18n( 0, $decimals ) . ' B';
+	}
+
 	foreach ( $quant as $unit => $mag ) {
 		if ( doubleval( $bytes ) >= $mag ) {
 			return number_format_i18n( $bytes / $mag, $decimals ) . ' ' . $unit;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index a01f051608..fa51ba9df3 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-beta1-37961';
+$wp_version = '4.6-beta1-37962';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.