diff --git a/ChangeLog b/ChangeLog
index fc25ed4314..cb7cb957d3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Sat Aug 10 12:43:15 2013  Kouhei Sutou  <kou@cozmixng.org>
+
+	* lib/rexml/parsers/baseparser.rb (REXML::Parsers::BaseParser):
+	  Use "\A" instead of "^" in document type declaration patterns
+	  because they are used as the head match in content not the head
+	  match in line. They don't cause any problems in the current code
+	  but it should be fixed.
+
 Sat Aug 10 12:39:00 2013  Kouhei Sutou  <kou@cozmixng.org>
 
 	* test/rexml/parse/test_document_type_declaration.rb: Add tests for
diff --git a/lib/rexml/parsers/baseparser.rb b/lib/rexml/parsers/baseparser.rb
index 04a23f4428..e937b169be 100644
--- a/lib/rexml/parsers/baseparser.rb
+++ b/lib/rexml/parsers/baseparser.rb
@@ -61,11 +61,11 @@ module REXML
       ENCODING = /\bencoding\s*=\s*["'](.*?)['"]/um
       STANDALONE = /\bstandalone\s*=\s*["'](.*?)['"]/um
 
-      ENTITY_START = /^\s*<!ENTITY/
+      ENTITY_START = /\A\s*<!ENTITY/
       IDENTITY = /^([!\*\w\-]+)(\s+#{NCNAME_STR})?(\s+["'](.*?)['"])?(\s+['"](.*?)["'])?/u
-      ELEMENTDECL_START = /^\s*<!ELEMENT/um
-      ELEMENTDECL_PATTERN = /^\s*(<!ELEMENT.*?)>/um
-      SYSTEMENTITY = /^\s*(%.*?;)\s*$/um
+      ELEMENTDECL_START = /\A\s*<!ELEMENT/um
+      ELEMENTDECL_PATTERN = /\A\s*(<!ELEMENT.*?)>/um
+      SYSTEMENTITY = /\A\s*(%.*?;)\s*$/um
       ENUMERATION = "\\(\\s*#{NMTOKEN}(?:\\s*\\|\\s*#{NMTOKEN})*\\s*\\)"
       NOTATIONTYPE = "NOTATION\\s+\\(\\s*#{NAME}(?:\\s*\\|\\s*#{NAME})*\\s*\\)"
       ENUMERATEDTYPE = "(?:(?:#{NOTATIONTYPE})|(?:#{ENUMERATION}))"
@@ -74,9 +74,9 @@ module REXML
       DEFAULTDECL = "(#REQUIRED|#IMPLIED|(?:(#FIXED\\s+)?#{ATTVALUE}))"
       ATTDEF = "\\s+#{NAME}\\s+#{ATTTYPE}\\s+#{DEFAULTDECL}"
       ATTDEF_RE = /#{ATTDEF}/
-      ATTLISTDECL_START = /^\s*<!ATTLIST/um
-      ATTLISTDECL_PATTERN = /^\s*<!ATTLIST\s+#{NAME}(?:#{ATTDEF})*\s*>/um
-      NOTATIONDECL_START = /^\s*<!NOTATION/um
+      ATTLISTDECL_START = /\A\s*<!ATTLIST/um
+      ATTLISTDECL_PATTERN = /\A\s*<!ATTLIST\s+#{NAME}(?:#{ATTDEF})*\s*>/um
+      NOTATIONDECL_START = /\A\s*<!NOTATION/um
       PUBLIC = /\A\s*<!NOTATION\s+(\w[\-\w]*)\s+(PUBLIC)\s+(["'])(.*?)\3(?:\s+(["'])(.*?)\5)?\s*>/um
       SYSTEM = /\A\s*<!NOTATION\s+(\w[\-\w]*)\s+(SYSTEM)\s+(["'])(.*?)\3\s*>/um