diff --git a/.editorconfig b/.editorconfig
index a40a586406f..3c4bd7d679d 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -7,8 +7,12 @@ root = true
 charset = utf-8
 end_of_line = lf
 insert_final_newline = true
+
+# PHP PSR-2 Coding Standards
+# http://www.php-fig.org/psr/psr-2/
 [*.php]
 indent_style = space
+indent_size = 4
 trim_trailing_whitespace = true
 [*.js]
 indent_style = tab