diff --git a/rfc-editor/rfc8794.xml b/rfc-editor/rfc8794.xml
index 34dbe040..2e4f4bc0 100644
--- a/rfc-editor/rfc8794.xml
+++ b/rfc-editor/rfc8794.xml
@@ -949,7 +949,7 @@ EBMLElement            = [IsRecursive] EBMLAtomName
 
 PathDelimiter          = &quot;\&quot;
 IsRecursive            = &quot;+&quot;
-EBMLAtomName           = ALPHA / DIGIT 0*EBMLNameChar
+EBMLAtomName           = (ALPHA / DIGIT) 0*EBMLNameChar
 EBMLNameChar           = ALPHA / DIGIT / &quot;-&quot; / &quot;.&quot;
 
 GlobalPlaceholder      = &quot;(&quot; GlobalParentOccurrence &quot;\)&quot;
diff --git a/specification.markdown b/specification.markdown
index fa77ae8a..18255ebc 100644
--- a/specification.markdown
+++ b/specification.markdown
@@ -674,7 +674,7 @@ EBMLElement            = [IsRecursive] EBMLAtomName
 
 PathDelimiter          = "\"
 IsRecursive            = "+"
-EBMLAtomName           = ALPHA / DIGIT 0*EBMLNameChar
+EBMLAtomName           = (ALPHA / DIGIT) 0*EBMLNameChar
 EBMLNameChar           = ALPHA / DIGIT / "-" / "."
 
 GlobalPlaceholder      = "(" GlobalParentOccurrence "\)"