diff --git a/src/wp-admin/install.php b/src/wp-admin/install.php
index 13ebf730bdbb3..e77ab539b50d8 100644
--- a/src/wp-admin/install.php
+++ b/src/wp-admin/install.php
@@ -225,7 +225,7 @@ function display_setup_form( $error = null ) {
 	display_header();
 	die(
 		'<h1>' . __( 'Already Installed' ) . '</h1>' .
-		'<p>' . __( 'You appear to have already installed WordPress. To reinstall please clear your old database tables first.' ) . '</p>' .
+		'<p>' . __( 'You appear to have already installed WordPress. To reinstall, please change your database table prefix.' ) . '</p>' .
 		'<p class="step"><a href="' . esc_url( wp_login_url() ) . '">' . __( 'Log In' ) . '</a></p>' .
 		'</body></html>'
 	);
diff --git a/src/wp-includes/ms-deprecated.php b/src/wp-includes/ms-deprecated.php
index 5a6b4415edf74..8c0294a4175de 100644
--- a/src/wp-includes/ms-deprecated.php
+++ b/src/wp-includes/ms-deprecated.php
@@ -616,7 +616,7 @@ function install_blog( $blog_id, $blog_title = '' ) {
 
 	$suppress = $wpdb->suppress_errors();
 	if ( $wpdb->get_results( "DESCRIBE {$wpdb->posts}" ) ) {
-		die( '<h1>' . __( 'Already Installed' ) . '</h1><p>' . __( 'You appear to have already installed WordPress. To reinstall please clear your old database tables first.' ) . '</p></body></html>' );
+		die( '<h1>' . __( 'Already Installed' ) . '</h1><p>' . __( 'You appear to have already installed WordPress. To reinstall, please change your database table prefix.' ) . '</p></body></html>' );
 	}
 	$wpdb->suppress_errors( $suppress );