Index: src/wp-admin/includes/media.php
===================================================================
--- src/wp-admin/includes/media.php	(revision 54917)
+++ src/wp-admin/includes/media.php	(working copy)
@@ -3468,9 +3468,9 @@
 		?>
 		<div class="misc-pub-section misc-pub-original-image word-wrap-break-word">
 			<?php _e( 'Original image:' ); ?>
-			<a href="<?php echo esc_url( wp_get_original_image_url( $attachment_id ) ); ?>">
+			<strong><a href="<?php echo esc_url( wp_get_original_image_url( $attachment_id ) ); ?>">
 				<?php echo esc_html( wp_basename( wp_get_original_image_path( $attachment_id ) ) ); ?>
-			</a>
+			</a></strong>
 		</div>
 		<?php
 	}
Index: src/wp-includes/media-template.php
===================================================================
--- src/wp-includes/media-template.php	(revision 54917)
+++ src/wp-includes/media-template.php	(working copy)
@@ -439,7 +439,7 @@
 
 					<# if ( data.originalImageURL && data.originalImageName ) { #>
 						<div class="word-wrap-break-word">
-							<?php _e( 'Original image:' ); ?>
+							<strong><?php _e( 'Original image:' ); ?></strong>
 							<a href="{{ data.originalImageURL }}">{{data.originalImageName}}</a>
 						</div>
 					<# } #>