diff --git a/registry.txt b/registry.txt
index 4ee37613..c85028c2 100644
--- a/registry.txt
+++ b/registry.txt
@@ -1287,7 +1287,7 @@ allowed combinations:
   * attr:bitpos - define a constant bitmask value in the same fashion as an
     <<tag-enum,tag:enum>> tag in an tag:enums block.
   * attr:extends - the name of a separately defined enumerated type (e.g. a
-    tag:type tag with attr:category`="enum"`) to which the extension
+    tag:type tag with attr:category``="enum"``) to which the extension
     enumerant is added. If not present, the enumerant is treated as a global
     constant value.
   * attr:extnumber - an extension number. The extension number in turn