diff --git a/docs/source/Grammar.md b/docs/source/Grammar.md
index 51cc5f0c0..d91e74fcd 100644
--- a/docs/source/Grammar.md
+++ b/docs/source/Grammar.md
@@ -35,9 +35,9 @@ enumval\_decl = ident [ `=` integer\_constant ]
 
 metadata = [ `(` commasep( ident [ `:` single\_value ] ) `)` ]
 
-scalar = integer\_constant | float\_constant
+scalar = boolean\_constant | integer\_constant | float\_constant
 
-object = { commasep( ident `:` value ) }
+object = `{` commasep( ident `:` value ) `}`
 
 single\_value = scalar | string\_constant
 
@@ -69,6 +69,6 @@ hex\_float\_constant = `[-+]?0[xX](([.][:xdigit:]+)|([:xdigit:]+[.][:xdigit:]*)|
 
 special\_float\_constant = `[-+]?(nan|inf|infinity)`
 
-float\_constant = decimal\_float\_constant | hexadecimal\_float\_constant | special\_float\_constant
+float\_constant = dec\_integer\_constant | hex\_integer\_constant | special\_float\_constant
 
-boolean\_constant = `(true|false)` | (integer\_constant ? `true` : `false`)
+boolean\_constant = `true` | `false`