diff --git a/doc/quickbook.qbk b/doc/quickbook.qbk
index 8dd21b7..6849777 100644
--- a/doc/quickbook.qbk
+++ b/doc/quickbook.qbk
@@ -634,7 +634,8 @@ from the output.
 [endsect]
 [section Unicode escape]
 
-You can enter any 32-bit unicode character by using `\u` followed by its 4 digit
+You can enter any 16-bit unicode character by using `\u` followed by its 4 digit
+hexadecimal code, or a 32-bit character by using `\U` followed by an 8 digit
 hexadecimal code. eg.
 
 [pre'''
@@ -2134,8 +2135,8 @@ boostbook standalone
     :
         my_doc
     :
-        <xsl:param>boost.image.src=images/my_project_logo.png
-        <xsl:param>boost.image.alt="\\"My Project\\""
+        <xsl:param>boost.image.src\=images/my_project_logo.png
+        <xsl:param>boost.image.alt\="\\"My Project\\""
         <xsl:param>boost.image.w=100
         <xsl:param>boost.image.h=50
         <xsl:param>nav.layout=none
diff --git a/phrase.hpp b/phrase.hpp
index 41f402a..f9d0066 100644
--- a/phrase.hpp
+++ b/phrase.hpp
@@ -275,10 +275,10 @@ namespace quickbook
                         str_p("\\n")                    [actions.break_]
                     |   "\\ "                           // ignore an escaped char
                     |   '\\' >> punct_p                 [actions.raw_char]
-                    |   "\\u">> repeat_p(4)
-                        [
-                            chset<>("0-9a-fA-F")
-                        ]                               [actions.escape_unicode]
+                    |   "\\u" >> repeat_p(4) [chset<>("0-9a-fA-F")]
+                                                        [actions.escape_unicode]
+                    |   "\\U" >> repeat_p(8) [chset<>("0-9a-fA-F")]
+                                                        [actions.escape_unicode]
                     |   (
                             ("'''" >> !eol)             [actions.escape_pre]
                         >>  *(anychar_p - "'''")        [actions.raw_char]
diff --git a/test/unicode-escape.gold b/test/unicode-escape.gold
index 8c2bd69..e2f8b12 100644
--- a/test/unicode-escape.gold
+++ b/test/unicode-escape.gold
@@ -82,4 +82,21 @@
       &#x3A9;&#x3C9; Omega
     </listitem>
   </itemizedlist>
+  <para>
+    In the unlikely event that you've got a Mahjong font:
+  </para>
+  <itemizedlist>
+    <listitem>
+      &#x1F000; East Wind
+    </listitem>
+    <listitem>
+      &#x1F001; South Wind
+    </listitem>
+    <listitem>
+      &#x1F002; West Wind
+    </listitem>
+    <listitem>
+      &#x1F003; North Wind
+    </listitem>
+  </itemizedlist>
 </article>
diff --git a/test/unicode-escape.quickbook b/test/unicode-escape.quickbook
index e8a1349..becdef6 100644
--- a/test/unicode-escape.quickbook
+++ b/test/unicode-escape.quickbook
@@ -27,4 +27,11 @@
 * \u03A6\u03C6 Phi
 * \u03A7\u03C7 Chi
 * \u03A8\u03C8 Psi
-* \u03A9\u03C9 Omega
\ No newline at end of file
+* \u03A9\u03C9 Omega
+
+In the unlikely event that you've got a Mahjong font:
+
+* \U0001F000 East Wind
+* \U0001F001 South Wind
+* \U0001F002 West Wind
+* \U0001F003 North Wind
\ No newline at end of file