diff --git a/lib/class-wp-widget-block.php b/lib/class-wp-widget-block.php
index 2e5d78546e21f2..b5fbe90c2162ef 100644
--- a/lib/class-wp-widget-block.php
+++ b/lib/class-wp-widget-block.php
@@ -176,7 +176,7 @@ public function update( $new_instance, $old_instance ) {
 	public function form( $instance ) {
 		$instance = wp_parse_args( (array) $instance, $this->default_instance );
 		?>
-		<textarea id="<?php echo $this->get_field_id( 'content' ); ?>" name="<?php echo $this->get_field_name( 'content' ); ?>" rows="6" cols="50" class="widefat text wp-block-textarea"><?php echo esc_textarea( $instance['content'] ); ?></textarea>
+		<textarea id="<?php echo $this->get_field_id( 'content' ); ?>" name="<?php echo $this->get_field_name( 'content' ); ?>" rows="6" cols="50" class="widefat text wp-block-widget-textarea"><?php echo esc_textarea( $instance['content'] ); ?></textarea>
 		<?php
 	}
 
diff --git a/lib/widgets-page.php b/lib/widgets-page.php
index 2cbfc3f4111270..6815bf5b75b7a7 100644
--- a/lib/widgets-page.php
+++ b/lib/widgets-page.php
@@ -33,7 +33,7 @@ function gutenberg_widgets_init( $hook ) {
 		wp_enqueue_style( 'wp-block-library-theme' );
 		wp_add_inline_style(
 			'wp-block-library-theme',
-			'.wp-block-textarea { width: 100%; min-height: 5em; margin: 8px 0 16px 0; }'
+			'.wp-block-widget-textarea { width: 100%; min-height: 5em; margin: 8px 0 16px 0; }'
 		);
 		return;
 	}