diff --git a/src/applications/diffusion/remarkup/DiffusionRemarkupRule.php b/src/applications/diffusion/remarkup/DiffusionRemarkupRule.php
index 8e3d4da871..65880bc193 100644
--- a/src/applications/diffusion/remarkup/DiffusionRemarkupRule.php
+++ b/src/applications/diffusion/remarkup/DiffusionRemarkupRule.php
@@ -12,9 +12,9 @@ final class DiffusionRemarkupRule
     $min_qualified   = PhabricatorRepository::MINIMUM_QUALIFIED_HASH;
 
     return
-      '(?:r[A-Z]+)?[0-9]+'.
+      'r[A-Z]+[1-9]\d*'.
       '|'.
-      '(?:r[A-Z]+)?[a-f0-9]{'.$min_qualified.',40}'.
+      'r[A-Z]+[a-f0-9]{'.$min_qualified.',40}'.
       '|'.
       '[a-f0-9]{'.$min_unqualified.',40}';
   }