diff --git a/standard/lexical-structure.md b/standard/lexical-structure.md
index 7798388a1..a2ff760d8 100644
--- a/standard/lexical-structure.md
+++ b/standard/lexical-structure.md
@@ -1488,12 +1488,12 @@ fragment PP_Line_Indicator
     ;
     
 fragment PP_Compilation_Unit_Name
-    : '"' PP_Compilation_Unit_Name_Character+ '"'
+    : '"' PP_Compilation_Unit_Name_Character* '"'
     ;
     
 fragment PP_Compilation_Unit_Name_Character
     // Any Input_Character except "
-    : ~('\u000D' | '\u000A'   | '\u0085' | '\u2028' | '\u2029' | '#')
+    : ~('\u000D' | '\u000A'   | '\u0085' | '\u2028' | '\u2029' | '"')
     ;
 ```