diff --git a/docs/docs/internals/syntax-3.1.md b/docs/docs/internals/syntax-3.1.md
index c2f9a0b15826..ef18bd1486b1 100644
--- a/docs/docs/internals/syntax-3.1.md
+++ b/docs/docs/internals/syntax-3.1.md
@@ -24,14 +24,14 @@ form.
 whiteSpace       ::=  ‘\u0020’ | ‘\u0009’ | ‘\u000D’ | ‘\u000A’
 upper            ::=  ‘A’ | … | ‘Z’ | ‘\$’ | ‘_’  “… and Unicode category Lu”
 lower            ::=  ‘a’ | … | ‘z’ “… and Unicode category Ll”
-letter           ::=  upper | lower “… and Unicode categories Lo, Lt, Nl”
+letter           ::=  upper | lower “… and Unicode categories Lo, Lt, Lm, Nl”
 digit            ::=  ‘0’ | … | ‘9’
 paren            ::=  ‘(’ | ‘)’ | ‘[’ | ‘]’ | ‘{’ | ‘}’ | ‘'(’ | ‘'[’ | ‘'{’
 delim            ::=  ‘`’ | ‘'’ | ‘"’ | ‘.’ | ‘;’ | ‘,’
-opchar           ::=  “printableChar not matched by (whiteSpace | upper | lower |
-                       letter | digit | paren | delim | opchar | Unicode_Sm |
-                       Unicode_So)”
-printableChar    ::=  “all characters in [\u0020, \u007F] inclusive”
+opchar           ::=  ‘!’ | ‘#’ | ‘%’ | ‘&’ | ‘*’ | ‘+’ | ‘-’ | ‘/’ | ‘:’ |
+                      ‘<’ | ‘=’ | ‘>’ | ‘?’ | ‘@’ | ‘\’ | ‘^’ | ‘|’ | ‘~’
+                      “… and Unicode categories Sm, So”
+printableChar    ::=  “all characters in [\u0020, \u007E] inclusive”
 charEscapeSeq    ::=  ‘\’ (‘b’ | ‘t’ | ‘n’ | ‘f’ | ‘r’ | ‘"’ | ‘'’ | ‘\’)
 
 op               ::=  opchar {opchar}
diff --git a/docs/docs/internals/syntax.md b/docs/docs/internals/syntax.md
index e83a1bc5a6e5..e998a96761c7 100644
--- a/docs/docs/internals/syntax.md
+++ b/docs/docs/internals/syntax.md
@@ -25,14 +25,14 @@ form.
 whiteSpace       ::=  ‘\u0020’ | ‘\u0009’ | ‘\u000D’ | ‘\u000A’
 upper            ::=  ‘A’ | … | ‘Z’ | ‘\$’ | ‘_’  “… and Unicode category Lu”
 lower            ::=  ‘a’ | … | ‘z’ “… and Unicode category Ll”
-letter           ::=  upper | lower “… and Unicode categories Lo, Lt, Nl”
+letter           ::=  upper | lower “… and Unicode categories Lo, Lt, Lm, Nl”
 digit            ::=  ‘0’ | … | ‘9’
 paren            ::=  ‘(’ | ‘)’ | ‘[’ | ‘]’ | ‘{’ | ‘}’ | ‘'(’ | ‘'[’ | ‘'{’
 delim            ::=  ‘`’ | ‘'’ | ‘"’ | ‘.’ | ‘;’ | ‘,’
-opchar           ::=  “printableChar not matched by (whiteSpace | upper |
-                       lower | letter | digit | paren | delim | opchar |
-                       Unicode_Sm | Unicode_So)”
-printableChar    ::=  “all characters in [\u0020, \u007F] inclusive”
+opchar           ::=  ‘!’ | ‘#’ | ‘%’ | ‘&’ | ‘*’ | ‘+’ | ‘-’ | ‘/’ | ‘:’ |
+                      ‘<’ | ‘=’ | ‘>’ | ‘?’ | ‘@’ | ‘\’ | ‘^’ | ‘|’ | ‘~’
+                      “… and Unicode categories Sm, So”
+printableChar    ::=  “all characters in [\u0020, \u007E] inclusive”
 charEscapeSeq    ::=  ‘\’ (‘b’ | ‘t’ | ‘n’ | ‘f’ | ‘r’ | ‘"’ | ‘'’ | ‘\’)
 
 op               ::=  opchar {opchar}