diff --git a/src/wp-content/themes/twentyeleven/header.php b/src/wp-content/themes/twentyeleven/header.php
index 6139bb6b25..f48e4cf74f 100644
--- a/src/wp-content/themes/twentyeleven/header.php
+++ b/src/wp-content/themes/twentyeleven/header.php
@@ -111,7 +111,7 @@
 							$header_image_height = HEADER_IMAGE_HEIGHT;
 						}
 						?>
-					<img src="<?php header_image(); ?>" width="<?php echo $header_image_width; ?>" height="<?php echo $header_image_height; ?>" alt="" />
+					<img src="<?php header_image(); ?>" width="<?php echo $header_image_width; ?>" height="<?php echo $header_image_height; ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" />
 				<?php endif; // end check for featured image or standard header ?>
 			</a>
 			<?php endif; // end check for removed header image ?>
diff --git a/src/wp-content/themes/twentyfourteen/header.php b/src/wp-content/themes/twentyfourteen/header.php
index bd8f8fac95..139e207faf 100644
--- a/src/wp-content/themes/twentyfourteen/header.php
+++ b/src/wp-content/themes/twentyfourteen/header.php
@@ -35,7 +35,7 @@
 	<?php if ( get_header_image() ) : ?>
 	<div id="site-header">
 		<a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home">
-			<img src="<?php header_image(); ?>" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="">
+			<img src="<?php header_image(); ?>" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>">
 		</a>
 	</div>
 	<?php endif; ?>
diff --git a/src/wp-content/themes/twentytwelve/header.php b/src/wp-content/themes/twentytwelve/header.php
index 8dcd9a99ed..4439627bea 100644
--- a/src/wp-content/themes/twentytwelve/header.php
+++ b/src/wp-content/themes/twentytwelve/header.php
@@ -46,7 +46,7 @@
 		</nav><!-- #site-navigation -->
 
 		<?php if ( get_header_image() ) : ?>
-		<a href="<?php echo esc_url( home_url( '/' ) ); ?>"><img src="<?php header_image(); ?>" class="header-image" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="" /></a>
+		<a href="<?php echo esc_url( home_url( '/' ) ); ?>"><img src="<?php header_image(); ?>" class="header-image" width="<?php echo get_custom_header()->width; ?>" height="<?php echo get_custom_header()->height; ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" /></a>
 		<?php endif; ?>
 	</header><!-- #masthead -->