diff --git a/include/XSLT/impl/xslt_processing_instruction.hpp b/include/XSLT/impl/xslt_processing_instruction.hpp
index 37a674ea..3965d1f7 100755
--- a/include/XSLT/impl/xslt_processing_instruction.hpp
+++ b/include/XSLT/impl/xslt_processing_instruction.hpp
@@ -1,6 +1,7 @@
 #ifndef ARABICA_XSLT_PROCESSING_INSTRUCTION_HPP
 #define ARABICA_XSLT_PROCESSING_INSTRUCTION_HPP
 
+#include <text/UnicodeCharacters.hpp>
 #include "xslt_item.hpp"
 
 namespace Arabica
@@ -21,17 +22,37 @@ public:
   virtual void execute(const DOM::Node<std::string>& node, ExecutionContext& context) const
   {
     std::string name = name_->evaluateAsString(node, context.xpathContext());
-    if(name.empty())
-      throw SAX::SAXException("xsl:processing-instruction : name attribute must evaluate to a valid name");
+    validate_name(name);
 
     context.sink().start_processing_instruction(name);
-
     execute_children(node, context);
-
     context.sink().end_processing_instruction();
   } // execute
 
 private:
+  void validate_name(const std::string& name) const
+  {
+    if(name.empty())
+      throw SAX::SAXException("xsl:processing-instruction : name attribute must evaluate to a valid name");
+
+    if(name.length() != 3)
+      return;
+
+    typedef Arabica::text::Unicode<char> UnicodeT;
+
+    if((name[0] != UnicodeT::CAPITAL_X) &&
+       (name[0] != UnicodeT::LOWERCASE_X))
+      return;
+    if((name[1] != UnicodeT::CAPITAL_M) &&
+       (name[1] != UnicodeT::LOWERCASE_M))
+      return;
+    if((name[2] != UnicodeT::CAPITAL_L) &&
+       (name[2] != UnicodeT::LOWERCASE_L))
+      return;
+      
+    throw SAX::SAXException("xsl:processing-instruction name can not be 'xml'");
+  } // validate_name
+
   Arabica::XPath::XPathExpressionPtr<std::string> name_;
 }; // class ProcessingInstruction
 
diff --git a/tests/XSLT/testsuite/TESTS/arabica-catalog.xml b/tests/XSLT/testsuite/TESTS/arabica-catalog.xml
index 7d11e304..849d24d6 100755
--- a/tests/XSLT/testsuite/TESTS/arabica-catalog.xml
+++ b/tests/XSLT/testsuite/TESTS/arabica-catalog.xml
@@ -19,6 +19,30 @@
 				<input-file role="principal-stylesheet">error02.xsl</input-file>
 			</scenario>
 		</test-case>
+		<test-case id="error03">
+			<file-path>errors</file-path>
+			<purpose>xsl:processing-instruction name cannot be 'xml'</purpose>
+			<scenario operation="execution-error">
+				<input-file role="principal-data">data.xml</input-file>
+				<input-file role="principal-stylesheet">error03.xsl</input-file>
+			</scenario>
+		</test-case>
+		<test-case id="error04">
+			<file-path>errors</file-path>
+			<purpose>xsl:processing-instruction name cannot be 'xml'</purpose>
+			<scenario operation="execution-error">
+				<input-file role="principal-data">data.xml</input-file>
+				<input-file role="principal-stylesheet">error04.xsl</input-file>
+			</scenario>
+		</test-case>
+		<test-case id="error05">
+			<file-path>errors</file-path>
+			<purpose>xsl:processing-instruction name cannot be 'xml'</purpose>
+			<scenario operation="execution-error">
+				<input-file role="principal-data">data.xml</input-file>
+				<input-file role="principal-stylesheet">error05.xsl</input-file>
+			</scenario>
+		</test-case>
 		<test-case id="include01">
 			<file-path>include</file-path>
 			<scenario operation="standard">
diff --git a/tests/XSLT/testsuite/TESTS/arabica/errors/error03.xsl b/tests/XSLT/testsuite/TESTS/arabica/errors/error03.xsl
new file mode 100755
index 00000000..9a3897f7
--- /dev/null
+++ b/tests/XSLT/testsuite/TESTS/arabica/errors/error03.xsl
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                version="1.0">
+
+  <xsl:output method="xml"/>
+
+  <xsl:template match="/">
+    <xsl:processing-instruction name="xml">woo</xsl:processing-instruction>
+  </xsl:template>
+
+</xsl:stylesheet>
diff --git a/tests/XSLT/testsuite/TESTS/arabica/errors/error04.xsl b/tests/XSLT/testsuite/TESTS/arabica/errors/error04.xsl
new file mode 100755
index 00000000..a55a5624
--- /dev/null
+++ b/tests/XSLT/testsuite/TESTS/arabica/errors/error04.xsl
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                version="1.0">
+
+  <xsl:output method="xml"/>
+
+  <xsl:template match="/">
+    <xsl:processing-instruction name="XML">woo</xsl:processing-instruction>
+  </xsl:template>
+
+</xsl:stylesheet>
diff --git a/tests/XSLT/testsuite/TESTS/arabica/errors/error05.xsl b/tests/XSLT/testsuite/TESTS/arabica/errors/error05.xsl
new file mode 100755
index 00000000..cab03c62
--- /dev/null
+++ b/tests/XSLT/testsuite/TESTS/arabica/errors/error05.xsl
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                version="1.0">
+
+  <xsl:output method="xml"/>
+
+  <xsl:template match="/">
+    <xsl:processing-instruction name="xMl">woo</xsl:processing-instruction>
+  </xsl:template>
+
+</xsl:stylesheet>