diff --git a/src/wp-admin/plugins.php b/src/wp-admin/plugins.php
index 4d8c797b04..c80e96831f 100644
--- a/src/wp-admin/plugins.php
+++ b/src/wp-admin/plugins.php
@@ -479,7 +479,15 @@ if ( isset( $_GET['error'] ) ) :
 	if ( isset( $_GET['main'] ) ) {
 		$errmsg = __( 'You cannot delete a plugin while it is active on the main site.' );
 	} elseif ( isset( $_GET['charsout'] ) ) {
-		$errmsg = sprintf( __( 'The plugin generated %d characters of <strong>unexpected output</strong> during activation. If you notice &#8220;headers already sent&#8221; messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.' ), $_GET['charsout'] );
+		$errmsg  = sprintf(
+			_n(
+				'The plugin generated %d character of <strong>unexpected output</strong> during activation.',
+				'The plugin generated %d characters of <strong>unexpected output</strong> during activation.',
+				$_GET['charsout']
+			),
+			$_GET['charsout']
+		);
+		$errmsg .= ' ' . __( 'If you notice &#8220;headers already sent&#8221; messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.' );
 	} else {
 		$errmsg = __( 'Plugin could not be activated because it triggered a <strong>fatal error</strong>.' );
 	}