Index: wp-admin/network/settings.php
===================================================================
--- wp-admin/network/settings.php	(revision 38170)
+++ wp-admin/network/settings.php	(working copy)
@@ -309,7 +309,13 @@
 			<tr>
 				<th scope="row"><label for="fileupload_maxk"><?php _e( 'Max upload file size' ) ?></label></th>
 				<td>
-					<?php printf( _x( '%s KB', 'File size in kilobytes' ), '<input name="fileupload_maxk" type="number" min="0" style="width: 100px" id="fileupload_maxk" aria-describedby="fileupload-maxk-desc" value="' . esc_attr( get_site_option( 'fileupload_maxk', 300 ) ) . '" />' ); ?>
+					<?php
+						printf(
+							/* translators: %s: File size in kilobytes */
+							__( '%s KB' ),
+							'<input name="fileupload_maxk" type="number" min="0" style="width: 100px" id="fileupload_maxk" aria-describedby="fileupload-maxk-desc" value="' . esc_attr( get_site_option( 'fileupload_maxk', 300 ) ) . '" />'
+						);
+					?>
 					<p class="screen-reader-text" id="fileupload-maxk-desc">
 						<?php _e( 'Size in kilobytes' ) ?>
 					</p>