diff --git a/src/Psalm/DocComment.php b/src/Psalm/DocComment.php
index 6f5a648c0..03df65468 100644
--- a/src/Psalm/DocComment.php
+++ b/src/Psalm/DocComment.php
@@ -151,7 +151,7 @@ class DocComment
                         'generator-return', 'ignore-falsable-return', 'variadic', 'pure',
                         'ignore-variable-method', 'ignore-variable-property', 'internal',
                         'taint-sink', 'taint-source', 'assert-untainted', 'scope-this',
-                        'mutation-free', 'external-mutation-free', 'immutable',
+                        'mutation-free', 'external-mutation-free', 'immutable', 'readonly',
                     ],
                     true
                 )) {
@@ -274,7 +274,7 @@ class DocComment
                         'generator-return', 'ignore-falsable-return', 'variadic', 'pure',
                         'ignore-variable-method', 'ignore-variable-property', 'internal',
                         'taint-sink', 'taint-source', 'assert-untainted', 'scope-this',
-                        'mutation-free', 'external-mutation-free', 'immutable',
+                        'mutation-free', 'external-mutation-free', 'immutable', 'readonly',
                     ],
                     true
                 )) {
diff --git a/src/Psalm/Internal/Analyzer/CommentAnalyzer.php b/src/Psalm/Internal/Analyzer/CommentAnalyzer.php
index 8eac0ee54..7c3f696ca 100644
--- a/src/Psalm/Internal/Analyzer/CommentAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/CommentAnalyzer.php
@@ -179,7 +179,8 @@ class CommentAnalyzer
                 $var_comment->type_end = $type_end;
                 $var_comment->deprecated = isset($parsed_docblock['specials']['deprecated']);
                 $var_comment->internal = isset($parsed_docblock['specials']['internal']);
-                $var_comment->readonly = isset($parsed_docblock['specials']['readonly']);
+                $var_comment->readonly = isset($parsed_docblock['specials']['readonly'])
+                    || isset($parsed_docblock['specials']['psalm-readonly']);
                 if (isset($parsed_docblock['specials']['psalm-internal'])) {
                     $psalm_internal = reset($parsed_docblock['specials']['psalm-internal']);
                     if ($psalm_internal) {
@@ -201,12 +202,14 @@ class CommentAnalyzer
         if (!$var_comments
             && (isset($parsed_docblock['specials']['deprecated'])
                 || isset($parsed_docblock['specials']['internal'])
-                || isset($parsed_docblock['specials']['readonly']))
+                || isset($parsed_docblock['specials']['readonly'])
+                || isset($parsed_docblock['specials']['psalm-readonly']))
         ) {
             $var_comment = new VarDocblockComment();
             $var_comment->deprecated = isset($parsed_docblock['specials']['deprecated']);
             $var_comment->internal = isset($parsed_docblock['specials']['internal']);
-            $var_comment->readonly = isset($parsed_docblock['specials']['readonly']);
+            $var_comment->readonly = isset($parsed_docblock['specials']['readonly'])
+                || isset($parsed_docblock['specials']['psalm-readonly']);
 
             $var_comments[] = $var_comment;
         }