diff --git a/ext/json/lib/json/common.rb b/ext/json/lib/json/common.rb
index f44184e138bb16..2b111c44e464b3 100644
--- a/ext/json/lib/json/common.rb
+++ b/ext/json/lib/json/common.rb
@@ -134,6 +134,7 @@ class MissingUnicodeSupport < JSONError; end
   module_function
 
   # Parse the JSON document _source_ into a Ruby data structure and return it.
+  # It raises JSON::ParserError if it fails to parse.
   #
   # _opts_ can have the following
   # keys:
@@ -158,6 +159,7 @@ def parse(source, opts = {})
   # Parse the JSON document _source_ into a Ruby data structure and return it.
   # The bang version of the parse method defaults to the more dangerous values
   # for the _opts_ hash, so be sure only to parse trusted _source_ documents.
+  # It raises JSON::ParserError if it fails to parse.
   #
   # _opts_ can have the following keys:
   # * *max_nesting*: The maximum depth of nesting allowed in the parsed data
diff --git a/ext/json/parser/parser.c b/ext/json/parser/parser.c
index ae9be78ec26898..e3d47e3a810c11 100644
--- a/ext/json/parser/parser.c
+++ b/ext/json/parser/parser.c
@@ -2098,6 +2098,7 @@ case 9:
  *
  *  Parses the current JSON text _source_ and returns the complete data
  *  structure as a result.
+ *  It raises JSON::ParseError if fail to parse.
  */
 static VALUE cParser_parse(VALUE self)
 {
diff --git a/ext/json/parser/parser.rl b/ext/json/parser/parser.rl
index 327e08cd81f2fa..2e6d024969e010 100644
--- a/ext/json/parser/parser.rl
+++ b/ext/json/parser/parser.rl
@@ -821,6 +821,7 @@ static VALUE cParser_parse_quirks_mode(VALUE self)
  *
  *  Parses the current JSON text _source_ and returns the complete data
  *  structure as a result.
+ *  It raises JSON::ParseError if fail to parse.
  */
 static VALUE cParser_parse(VALUE self)
 {