diff --git a/wp-admin/includes/class-wp-themes-list-table.php b/wp-admin/includes/class-wp-themes-list-table.php
index ca29f73749..5d18ded1d0 100644
--- a/wp-admin/includes/class-wp-themes-list-table.php
+++ b/wp-admin/includes/class-wp-themes-list-table.php
@@ -136,7 +136,7 @@ class WP_Themes_List_Table extends WP_List_Table {
 				. esc_attr( sprintf( __( 'Activate &#8220;%s&#8221;' ), $title ) ) . '">' . __( 'Activate' ) . '</a>';
 			$actions[] = '<a href="' . $preview_link . '" class="hide-if-customize" title="'
 				. esc_attr( sprintf( __( 'Preview &#8220;%s&#8221;' ), $title ) ) . '">' . __( 'Preview' ) . '</a>'
-				. '<a ' . wp_customize_href( $template, $stylesheet ) . ' class="load-customize hide-if-no-customize">'
+				. '<a href="' . wp_customize_url( $stylesheet, $template ) . '" class="load-customize hide-if-no-customize">'
 				. __( 'Customize' ) . '</a>';
 			if ( ! is_multisite() && current_user_can( 'delete_themes' ) )
 				$actions['delete'] = '<a class="submitdelete deletion" href="' . wp_nonce_url( "themes.php?action=delete&amp;template=$stylesheet", 'delete-theme_' . $stylesheet )
@@ -154,7 +154,7 @@ class WP_Themes_List_Table extends WP_List_Table {
 					<img src="<?php echo esc_url( $screenshot ); ?>" alt="" />
 				<?php endif; ?>
 			</a>
-			<a <?php echo wp_customize_href( $template, $stylesheet ); ?> class="screenshot load-customize hide-if-no-customize">
+			<a href="<?php echo wp_customize_url( $stylesheet, $template ); ?>" class="screenshot load-customize hide-if-no-customize">
 				<?php if ( $screenshot = $theme->get_screenshot() ) : ?>
 					<img src="<?php echo esc_url( $screenshot ); ?>" alt="" />
 				<?php endif; ?>
diff --git a/wp-admin/includes/class-wp-upgrader.php b/wp-admin/includes/class-wp-upgrader.php
index 88bc933ad7..4ff7cf587b 100644
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -1516,7 +1516,7 @@ class Theme_Installer_Skin extends WP_Upgrader_Skin {
 
 		$install_actions = array();
 		$install_actions['preview']  = '<a href="' . esc_url( $preview_link ) . '" class="hide-if-customize" title="' . esc_attr(sprintf(__('Preview &#8220;%s&#8221;'), $name ) ) . '">' . __('Preview') . '</a>';
-		$install_actions['preview'] .= '<a ' . wp_customize_href( $template, $stylesheet ) . ' class="hide-if-no-customize load-customize>' . __('Customize') . '</a>';
+		$install_actions['preview'] .= '<a href="' . wp_customize_url( $stylesheet, $template ) . '" class="hide-if-no-customize load-customize>' . __('Customize') . '</a>';
 		$install_actions['activate'] = '<a href="' . esc_url( $activate_link ) . '" class="activatelink" title="' . esc_attr( sprintf( __('Activate &#8220;%s&#8221;'), $name ) ) . '">' . __('Activate') . '</a>';
 
 		if ( is_network_admin() && current_user_can( 'manage_network_themes' ) )
@@ -1579,7 +1579,7 @@ class Theme_Upgrader_Skin extends WP_Upgrader_Skin {
 			$activate_link = wp_nonce_url( $activate_link, 'switch-theme_' . $template );
 
 			$update_actions['preview']  = '<a href="' . esc_url( $preview_link ) . '" class="hide-if-customize" title="' . esc_attr(sprintf(__('Preview &#8220;%s&#8221;'), $name ) ) . '">' . __('Preview') . '</a>';
-			$update_actions['preview'] .= '<a ' . wp_customize_href( $template, $stylesheet ) . ' class="hide-if-no-customize load-customize">' . __('Customize') . '</a>';
+			$update_actions['preview'] .= '<a href="' . wp_customize_url( $stylesheet, $template ) . '" class="hide-if-no-customize load-customize">' . __('Customize') . '</a>';
 			$update_actions['activate'] = '<a href="' . esc_url( $activate_link ) . '" class="activatelink" title="' . esc_attr( sprintf( __('Activate &#8220;%s&#8221;'), $name ) ) . '">' . __('Activate') . '</a>';
 
 			if ( ( ! $this->result || is_wp_error( $this->result ) ) || $stylesheet == get_stylesheet() )
diff --git a/wp-admin/themes.php b/wp-admin/themes.php
index 041ddcd919..e1b4d64e8b 100644
--- a/wp-admin/themes.php
+++ b/wp-admin/themes.php
@@ -122,7 +122,7 @@ $class = $screenshot ? 'has-screenshot' : '';
 	</div>
 
 <div class="theme-options">
-	<a <?php echo wp_customize_href( $ct->get_template(), $ct->get_stylesheet() ); ?> class="load-customize hide-if-no-customize" title="<?php echo esc_attr( sprintf( __( 'Customize &#8220;%s&#8221;' ), $ct->get('Name') ) ); ?>"><?php _e( 'Customize' )?></a>
+	<a href="<?php echo wp_customize_url( $ct->get_stylesheet(), $ct->get_template() ); ?>" class="load-customize hide-if-no-customize" title="<?php echo esc_attr( sprintf( __( 'Customize &#8220;%s&#8221;' ), $ct->display('Name') ) ); ?>"><?php _e( 'Customize' )?></a>
 	<span><?php _e( 'Options:' )?></span>
 	<?php
 	// Pretend you didn't see this.
diff --git a/wp-includes/theme.php b/wp-includes/theme.php
index a897876a2b..5a6785a8af 100644
--- a/wp-includes/theme.php
+++ b/wp-includes/theme.php
@@ -1599,17 +1599,6 @@ add_action( 'admin_enqueue_scripts', '_wp_customize_loader_localize' );
  *
  * @since 3.4.0
  */
-function wp_customize_url( $template, $stylesheet = null ) {
-	$stylesheet = isset( $stylesheet ) ? $stylesheet : $template;
-	return admin_url( 'admin.php' ) . '?customize=on&template=' . $template . '&stylesheet=' . $stylesheet;
-}
-
-/**
- * Prints an href attribute to load the theme customizer.
- *
- * @since 3.4.0
- */
-function wp_customize_href( $template, $stylesheet = null ) {
-	$link = wp_customize_url( $template, $stylesheet );
-	return 'href="' . esc_url( $link ) . '"';
+function wp_customize_url( $stylesheet, $template ) {
+	return esc_url( admin_url( 'admin.php' ) . '?customize=on&template=' . $template . '&stylesheet=' . $stylesheet );
 }
\ No newline at end of file